Sync Suno v6 WildSongBench results and frontier figure

Use competitive with Suno v5/v6; refresh the September 12 comparison and matching figure. Keep inference, weights, prompts and evaluation code unchanged.

README.md

@@ -66,7 +66,7 @@ Each record contains a `prompt`. [Generation inputs](benchmark/reproduction_mani
 
 ## 📊 Benchmarks
 
-Recorded paper results on all 192 prompts. SongBench averages seven quality dimensions; Q3O measures prompt control on a 0–5 scale. MuQ-MuLan and AllMusicCaps measure audio–text similarity. PER is phoneme error rate.
+Recorded paper results on all 192 prompts, updated September 12, 2026, with 17 settings including Suno v6 and Suno v6 Wild. YuE2 has frontier song quality competitive with Suno v5/v6. SongBench averages seven quality dimensions; Q3O measures prompt control on a 0–5 scale. MuQ-MuLan and AllMusicCaps measure audio–text similarity. PER is phoneme error rate.
 
 | Model | Access | SongBench ↑ | Q3O ↑ | MuQ-MuLan ↑ | AllMusicCaps ↑ | PER ↓ |
 |---|---|---:|---:|---:|---:|---:|
@@ -76,6 +76,8 @@ Recorded paper results on all 192 prompts. SongBench averages seven quality dime
 | Suno v5 | Proprietary | 6.87 | 4.59 | 0.543 | 0.435 | 8.10% |
 | Suno v5.5 | Proprietary | 6.71 | 4.59 | 0.509 | 0.392 | 5.96% |
 | Suno v4.5 | Proprietary | 6.70 | 4.41 | 0.502 | 0.387 | 5.80% |
+| Suno v6 | Proprietary | 6.56 | 4.63 | 0.492 | 0.430 | 7.58% |
+| Suno v6 Wild | Proprietary | 6.42 | 4.59 | 0.500 | 0.432 | 7.45% |
 | LeVo 2 | Open weights | 6.32 | 3.95 | 0.354 | 0.268 | 26.12% |
 | MiniMax Music 2.6 | Proprietary | 6.32 | 4.57 | 0.425 | 0.367 | 24.55% |
 | MiniMax Music 3 | Open weights | 6.28 | 4.44 | 0.393 | 0.361 | 6.27% |
@@ -86,7 +88,11 @@ Recorded paper results on all 192 prompts. SongBench averages seven quality dime
 | YuE 1 | Open weights | 4.92 | 3.73 | 0.262 | 0.288 | 36.38% |
 | SongBloom | Open weights | 4.24 | 3.03 | 0.270 | 0.193 | 19.19% |
 
-Systems use their recorded candidate-selection protocols; this is not a matched-compute comparison. [Full results and protocols](benchmark/comparison_summary.csv).
+Systems use their recorded candidate-selection protocols; this is not a matched-compute comparison. [All nine metrics and protocols](benchmark/results.md) · [Full-precision CSV](benchmark/benchmark-results.csv) · [JSON](benchmark/benchmark-results.json) · [Extended comparison CSV](benchmark/comparison_summary.csv).
+
+![YuE2 song quality and text alignment on WildSongBench](benchmark/frontier-teaser.png)
+
+*Both YuE2 settings use symbolic planning. Bo8 = best-of-8. [Vector PDF](benchmark/frontier-teaser.pdf) · [SVG](benchmark/frontier-teaser.svg) · [Figure data and normalization](benchmark/frontier-composites.json).*
 
 <a id="reproduce-standard-yue2"></a>
 

SHA256SUMS

@@ -1,6 +1,13 @@
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 bd550b36f1fc43cad3254a9897dd3a078e50c4eb9e8d4f295ac4b5e81d1fc4fd  evaluation/wsb_metrics.tar.gz

benchmark/benchmark-results.csv

@@ -0,0 +1,18 @@
+dataset,system,n,songbench_global_avg,songbench_musicality,songeval_global_avg,songeval_musicality,audiobox_pq,mulan,allmusiccaps,control_overall,per
+WSB,YuE2,192,6.731599404761909,5.907463020833336,4.262452916666666,4.2151218749999995,8.25979095697403,0.5068482221880307,0.40536119728009606,4.681896986601725,0.08443630690279864
+WSB,YuE2 (best-of-8),192,6.963229315476184,6.266602604166664,4.296048333333334,4.250610416666664,8.271365446348986,0.5050805467180908,0.398045457637636,4.70087253751977,0.09786539961704843
+WSB,ACE-Step 1.5,192,6.011793824404761,5.158814583333332,3.846484166666666,3.805107291666667,8.051833018660545,0.43723272854307044,0.38685302749703016,4.580894501177339,0.07457884998484957
+WSB,DiffRhythm 2,192,5.242845982142859,4.477539583333331,3.5244677083333333,3.471093229166668,7.978225273390611,0.37817035724098486,0.32549789230688475,4.087044602340498,0.18413265339015286
+WSB,HeartMuLa,192,6.248347544642855,5.496267708333332,4.551859166666667,4.5329015625,8.293305036922296,0.3823466453177389,0.2786190857962841,3.490655976705673,0.10705881594471056
+WSB,LeVo 2,192,6.324671800595234,5.4589927083333345,4.023369479166667,3.981881250000001,8.396623315910498,0.3542381529114209,0.2679880544101252,3.9457878565807953,0.26116136186343974
+WSB,MiniMax Music 2.6,192,6.3221788690476215,5.443674479166666,4.098453333333334,4.055989583333334,8.171058195332686,0.42510899043797207,0.3669951342102043,4.568809841873251,0.24545647955335212
+WSB,MiniMax Music 3,192,6.282988392857145,5.348229166666669,4.099352187500001,4.0430729166666675,8.28245102117459,0.39279851930526394,0.36085424468425725,4.43616720498247,0.06268414232388418
+WSB,Mureka 9,192,6.937748809523812,6.048820833333333,4.411131979166667,4.361940104166667,8.022609589000544,0.43942587031051517,0.41017753163275,4.636807564214055,0.11690337887061523
+WSB,Muse,192,6.034903943452382,5.169220312499998,3.788667708333335,3.736199999999999,8.051745663086573,0.3936510290513979,0.3465821466803997,4.403758449771435,0.33418648580693827
+WSB,SongBloom,192,4.235043750000001,3.4492635416666655,3.2051130208333345,3.204842187499999,8.153916046023369,0.2697471845106823,0.19264957021005102,3.0286910546158463,0.19193351857701904
+WSB,Suno v4.5,192,6.699528199404766,5.831729166666669,4.366563958333332,4.319757291666664,8.254062737027803,0.5021767822715143,0.38734816436772235,4.41490242329515,0.05798428222369787
+WSB,Suno v5,192,6.872074330357141,5.9918354166666665,4.357936874999999,4.305118229166664,8.169838989774385,0.5428044088184834,0.43525151138116297,4.5907186541713685,0.080993611026942
+WSB,Suno v5.5,192,6.714983407738093,5.808658854166672,4.2151607291666675,4.149727604166669,8.195489337046942,0.5088621161606474,0.3917035845806822,4.591446755445953,0.05958313723720433
+WSB,Suno v6,192,6.556171130952383,5.6557864583333375,4.308628645833337,4.263533854166667,8.129587392012278,0.4916386870124067,0.4304573973834825,4.625818883206533,0.07580377922906821
+WSB,Suno v6 Wild,192,6.419507440476191,5.564441145833332,4.219912500000002,4.171640104166664,8.178526304662228,0.49989257991546765,0.43164352465343353,4.589767688464477,0.07454661500473854
+WSB,YuE 1,192,4.916463244047622,4.084726562499998,3.214967395833334,3.1524088541666675,7.868339642882347,0.262323199029197,0.2881557388876293,3.7300764989993715,0.3637846445448743

benchmark/benchmark-results.json

@@ -0,0 +1,316 @@
+{
+  "snapshot": "2026-09-12",
+  "scope": "15 comparator systems and 2 YuE2 settings on WildSongBench; recorded generation and selection protocols, not matched compute.",
+  "datasets": [
+    {
+      "id": "WSB",
+      "label": "WildSongBench",
+      "prompts": 192
+    }
+  ],
+  "metrics": [
+    {
+      "key": "songbench_global_avg",
+      "label": "SongBench",
+      "description": "Seven-dimension global average",
+      "maximum": 10,
+      "lowerIsBetter": false
+    },
+    {
+      "key": "songbench_musicality",
+      "label": "SongBench Musicality",
+      "description": "SongBench musicality dimension",
+      "maximum": 10,
+      "lowerIsBetter": false
+    },
+    {
+      "key": "songeval_global_avg",
+      "label": "SongEval",
+      "description": "Five-dimension global average",
+      "maximum": 5,
+      "lowerIsBetter": false
+    },
+    {
+      "key": "songeval_musicality",
+      "label": "SongEval Musicality",
+      "description": "SongEval musicality dimension",
+      "maximum": 5,
+      "lowerIsBetter": false
+    },
+    {
+      "key": "audiobox_pq",
+      "label": "AudioBox PQ",
+      "description": "Production quality",
+      "maximum": 10,
+      "lowerIsBetter": false
+    },
+    {
+      "key": "mulan",
+      "label": "MuLan",
+      "description": "Style–audio similarity",
+      "maximum": 1,
+      "lowerIsBetter": false
+    },
+    {
+      "key": "allmusiccaps",
+      "label": "AllMusicCaps",
+      "description": "Style–audio similarity",
+      "maximum": 1,
+      "lowerIsBetter": false
+    },
+    {
+      "key": "control_overall",
+      "label": "Q3O Control",
+      "description": "Prompt-weighted overall control",
+      "maximum": 5,
+      "lowerIsBetter": false
+    },
+    {
+      "key": "per",
+      "label": "PER",
+      "description": "Phoneme error rate",
+      "maximum": 1,
+      "lowerIsBetter": true
+    }
+  ],
+  "rows": [
+    {
+      "dataset": "WSB",
+      "system": "YuE2",
+      "n": 192,
+      "songbench_global_avg": 6.731599404761909,
+      "songbench_musicality": 5.907463020833336,
+      "songeval_global_avg": 4.262452916666666,
+      "songeval_musicality": 4.2151218749999995,
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+      "mulan": 0.5068482221880307,
+      "allmusiccaps": 0.40536119728009606,
+      "control_overall": 4.681896986601725,
+      "per": 0.08443630690279864
+    },
+    {
+      "dataset": "WSB",
+      "system": "YuE2 (best-of-8)",
+      "n": 192,
+      "songbench_global_avg": 6.963229315476184,
+      "songbench_musicality": 6.266602604166664,
+      "songeval_global_avg": 4.296048333333334,
+      "songeval_musicality": 4.250610416666664,
+      "audiobox_pq": 8.271365446348986,
+      "mulan": 0.5050805467180908,
+      "allmusiccaps": 0.398045457637636,
+      "control_overall": 4.70087253751977,
+      "per": 0.09786539961704843
+    },
+    {
+      "dataset": "WSB",
+      "system": "ACE-Step 1.5",
+      "n": 192,
+      "songbench_global_avg": 6.011793824404761,
+      "songbench_musicality": 5.158814583333332,
+      "songeval_global_avg": 3.846484166666666,
+      "songeval_musicality": 3.805107291666667,
+      "audiobox_pq": 8.051833018660545,
+      "mulan": 0.43723272854307044,
+      "allmusiccaps": 0.38685302749703016,
+      "control_overall": 4.580894501177339,
+      "per": 0.07457884998484957
+    },
+    {
+      "dataset": "WSB",
+      "system": "DiffRhythm 2",
+      "n": 192,
+      "songbench_global_avg": 5.242845982142859,
+      "songbench_musicality": 4.477539583333331,
+      "songeval_global_avg": 3.5244677083333333,
+      "songeval_musicality": 3.471093229166668,
+      "audiobox_pq": 7.978225273390611,
+      "mulan": 0.37817035724098486,
+      "allmusiccaps": 0.32549789230688475,
+      "control_overall": 4.087044602340498,
+      "per": 0.18413265339015286
+    },
+    {
+      "dataset": "WSB",
+      "system": "HeartMuLa",
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+      "songbench_global_avg": 6.248347544642855,
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+      "control_overall": 3.490655976705673,
+      "per": 0.10705881594471056
+    },
+    {
+      "dataset": "WSB",
+      "system": "LeVo 2",
+      "n": 192,
+      "songbench_global_avg": 6.324671800595234,
+      "songbench_musicality": 5.4589927083333345,
+      "songeval_global_avg": 4.023369479166667,
+      "songeval_musicality": 3.981881250000001,
+      "audiobox_pq": 8.396623315910498,
+      "mulan": 0.3542381529114209,
+      "allmusiccaps": 0.2679880544101252,
+      "control_overall": 3.9457878565807953,
+      "per": 0.26116136186343974
+    },
+    {
+      "dataset": "WSB",
+      "system": "MiniMax Music 2.6",
+      "n": 192,
+      "songbench_global_avg": 6.3221788690476215,
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+      "songeval_global_avg": 4.098453333333334,
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+      "per": 0.24545647955335212
+    },
+    {
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+      "system": "MiniMax Music 3",
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+      "per": 0.06268414232388418
+    },
+    {
+      "dataset": "WSB",
+      "system": "Mureka 9",
+      "n": 192,
+      "songbench_global_avg": 6.937748809523812,
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+      "per": 0.11690337887061523
+    },
+    {
+      "dataset": "WSB",
+      "system": "Muse",
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+    },
+    {
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+    },
+    {
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+    },
+    {
+      "dataset": "WSB",
+      "system": "Suno v6 Wild",
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+      "control_overall": 4.589767688464477,
+      "per": 0.07454661500473854
+    },
+    {
+      "dataset": "WSB",
+      "system": "YuE 1",
+      "n": 192,
+      "songbench_global_avg": 4.916463244047622,
+      "songbench_musicality": 4.084726562499998,
+      "songeval_global_avg": 3.214967395833334,
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+      "audiobox_pq": 7.868339642882347,
+      "mulan": 0.262323199029197,
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+      "control_overall": 3.7300764989993715,
+      "per": 0.3637846445448743
+    }
+  ]
+}

benchmark/comparison_summary.csv

@@ -1,16 +1,18 @@
-system,n,protocol,per,control_overall,songbench_global_avg,songeval_global_avg,audiobox_pq,mulan,allmusiccaps,audiobox_ce,audiobox_cu,audiobox_pc
-YuE2,192,roll2 / four-ASR lower-PER selection,0.08443630690279864,4.681896986601725,6.731599404761909,4.262452916666666,8.25979095697403,0.5068482221880307,0.40536119728009606,7.5946645612518,7.883815668523312,6.329105652868748
-YuE2 (best-of-8),192,best-of-8 / Musicality → Control → PER,0.09786539961704843,4.70087253751977,6.963229315476184,4.296048333333334,8.271365446348986,0.5050805467180908,0.398045457637636,7.585739687085152,7.882911428809166,6.349051711459954
-ACE-Step 1.5,192,roll2 / four-ASR lower-PER selection,0.07457884998484957,4.580894501177339,6.011793824404761,3.846484166666666,8.051833018660545,0.43723272854307044,0.38685302749703016,7.345652607580026,7.696453630924225,6.559373706579208
-DiffRhythm 2,192,roll2 / four-ASR lower-PER selection,0.18413265339015286,4.087044602340498,5.242845982142859,3.5244677083333333,7.978225273390611,0.37817035724098486,0.32549789230688475,7.221992149949074,7.5754738847414655,6.354656022042036
-HeartMuLa,192,roll2 / four-ASR lower-PER selection,0.10705881594471056,3.490655976705673,6.248347544642855,4.551859166666667,8.293305036922296,0.3823466453177389,0.2786190857962841,7.695213384926319,7.913336729009946,6.434617171684901
-LeVo 2,192,roll2 / four-ASR lower-PER selection,0.26116136186343974,3.9457878565807953,6.324671800595234,4.023369479166667,8.396623315910498,0.3542381529114209,0.2679880544101252,7.640917373200257,7.93210681527853,6.627885211259127
-MiniMax Music 2.6,192,delivered candidate / stored ASR selection,0.24545647955335212,4.568809841873251,6.3221788690476215,4.098453333333334,8.171058195332686,0.42510899043797207,0.3669951342102043,7.385788751145204,7.8092692494392395,6.509756391247113
-MiniMax Music 3,192,roll2 / four-ASR lower-PER selection / Standard + Official Rewriter,0.06268414232388418,4.43616720498247,6.282988392857145,4.099352187500001,8.28245102117459,0.39279851930526394,0.36085424468425725,7.516246639192104,7.886647321283817,6.417244121432304
-Mureka 9,192,delivered candidate / stored ASR selection,0.11690337887061523,4.636807564214055,6.937748809523812,4.411131979166667,8.022609589000544,0.43942587031051517,0.41017753163275,7.425450682640076,7.709370714922746,6.665880647798379
-Muse,192,roll2 / four-ASR lower-PER selection,0.33418648580693827,4.403758449771435,6.034903943452382,3.788667708333335,8.051745663086573,0.3936510290513979,0.3465821466803997,7.357404105365276,7.562788394590219,6.79859949896733
-SongBloom,192,roll2 / four-ASR lower-PER selection; fixed prompt audio,0.19193351857701904,3.0286910546158463,4.235043750000001,3.2051130208333345,8.153916046023369,0.2697471845106823,0.19264957021005102,7.1598992844422655,7.663380955656369,4.881139911711216
-Suno v4.5,192,delivered candidate / stored ASR selection,0.05798428222369787,4.41490242329515,6.699528199404766,4.366563958333332,8.254062737027803,0.5021767822715143,0.38734816436772235,7.566704971094926,7.847558493415515,6.4596482912699384
-Suno v5,192,delivered candidate / stored ASR selection,0.080993611026942,4.5907186541713685,6.872074330357141,4.357936874999999,8.169838989774385,0.5428044088184834,0.43525151138116297,7.522664589186509,7.8013999834656715,6.551953633626302
-Suno v5.5,192,delivered candidate / stored ASR selection,0.05958313723720433,4.591446755445953,6.714983407738093,4.2151607291666675,8.195489337046942,0.5088621161606474,0.3917035845806822,7.4402403980493546,7.9158454810579615,6.531025744974613
-YuE 1,192,roll2 / four-ASR lower-PER selection,0.3637846445448743,3.7300764989993715,4.916463244047622,3.214967395833334,7.868339642882347,0.262323199029197,0.2881557388876293,6.952277842909098,7.441528876622518,5.72498715420564
+system,n,protocol,per,control_overall,songbench_global_avg,songeval_global_avg,audiobox_pq,mulan,allmusiccaps,audiobox_ce,audiobox_cu,audiobox_pc,songbench_musicality,songeval_musicality
+YuE2,192,roll2 / four-ASR lower-PER selection,0.08443630690279864,4.681896986601725,6.731599404761909,4.262452916666666,8.25979095697403,0.5068482221880307,0.40536119728009606,7.5946645612518,7.883815668523312,6.329105652868748,5.907463020833336,4.2151218749999995
+YuE2 (best-of-8),192,best-of-8 / Musicality → Control → PER,0.09786539961704843,4.70087253751977,6.963229315476184,4.296048333333334,8.271365446348986,0.5050805467180908,0.398045457637636,7.585739687085152,7.882911428809166,6.349051711459954,6.266602604166664,4.250610416666664
+ACE-Step 1.5,192,roll2 / four-ASR lower-PER selection,0.07457884998484957,4.580894501177339,6.011793824404761,3.846484166666666,8.051833018660545,0.43723272854307044,0.38685302749703016,7.345652607580026,7.696453630924225,6.559373706579208,5.158814583333332,3.805107291666667
+DiffRhythm 2,192,roll2 / four-ASR lower-PER selection,0.18413265339015286,4.087044602340498,5.242845982142859,3.5244677083333333,7.978225273390611,0.37817035724098486,0.32549789230688475,7.221992149949074,7.5754738847414655,6.354656022042036,4.477539583333331,3.471093229166668
+HeartMuLa,192,roll2 / four-ASR lower-PER selection,0.10705881594471056,3.490655976705673,6.248347544642855,4.551859166666667,8.293305036922296,0.3823466453177389,0.2786190857962841,7.695213384926319,7.913336729009946,6.434617171684901,5.496267708333332,4.5329015625
+LeVo 2,192,roll2 / four-ASR lower-PER selection,0.26116136186343974,3.9457878565807953,6.324671800595234,4.023369479166667,8.396623315910498,0.3542381529114209,0.2679880544101252,7.640917373200257,7.93210681527853,6.627885211259127,5.4589927083333345,3.981881250000001
+MiniMax Music 2.6,192,delivered candidate / stored ASR selection,0.24545647955335212,4.568809841873251,6.3221788690476215,4.098453333333334,8.171058195332686,0.42510899043797207,0.3669951342102043,7.385788751145204,7.8092692494392395,6.509756391247113,5.443674479166666,4.055989583333334
+MiniMax Music 3,192,roll2 / four-ASR lower-PER selection / Standard + Official Rewriter,0.06268414232388418,4.43616720498247,6.282988392857145,4.099352187500001,8.28245102117459,0.39279851930526394,0.36085424468425725,7.516246639192104,7.886647321283817,6.417244121432304,5.348229166666669,4.0430729166666675
+Mureka 9,192,delivered candidate / stored ASR selection,0.11690337887061523,4.636807564214055,6.937748809523812,4.411131979166667,8.022609589000544,0.43942587031051517,0.41017753163275,7.425450682640076,7.709370714922746,6.665880647798379,6.048820833333333,4.361940104166667
+Muse,192,roll2 / four-ASR lower-PER selection,0.33418648580693827,4.403758449771435,6.034903943452382,3.788667708333335,8.051745663086573,0.3936510290513979,0.3465821466803997,7.357404105365276,7.562788394590219,6.79859949896733,5.169220312499998,3.736199999999999
+SongBloom,192,roll2 / four-ASR lower-PER selection; fixed prompt audio,0.19193351857701904,3.0286910546158463,4.235043750000001,3.2051130208333345,8.153916046023369,0.2697471845106823,0.19264957021005102,7.1598992844422655,7.663380955656369,4.881139911711216,3.4492635416666655,3.204842187499999
+Suno v4.5,192,delivered candidate / stored ASR selection,0.05798428222369787,4.41490242329515,6.699528199404766,4.366563958333332,8.254062737027803,0.5021767822715143,0.38734816436772235,7.566704971094926,7.847558493415515,6.4596482912699384,5.831729166666669,4.319757291666664
+Suno v5,192,delivered candidate / stored ASR selection,0.080993611026942,4.5907186541713685,6.872074330357141,4.357936874999999,8.169838989774385,0.5428044088184834,0.43525151138116297,7.522664589186509,7.8013999834656715,6.551953633626302,5.9918354166666665,4.305118229166664
+Suno v5.5,192,delivered candidate / stored ASR selection,0.05958313723720433,4.591446755445953,6.714983407738093,4.2151607291666675,8.195489337046942,0.5088621161606474,0.3917035845806822,7.4402403980493546,7.9158454810579615,6.531025744974613,5.808658854166672,4.149727604166669
+YuE 1,192,roll2 / four-ASR lower-PER selection,0.3637846445448743,3.7300764989993715,4.916463244047622,3.214967395833334,7.868339642882347,0.262323199029197,0.2881557388876293,6.952277842909098,7.441528876622518,5.72498715420564,4.084726562499998,3.1524088541666675
+Suno v6,192,two candidates / four-ASR lower-PER selection,0.07580377922906821,4.625818883206533,6.556171130952383,4.308628645833337,8.129587392012278,0.4916386870124067,0.4304573973834825,7.4500318467617035,7.844655069212119,6.346438991526763,5.6557864583333375,4.263533854166667
+Suno v6 Wild,192,two candidates / four-ASR lower-PER selection,0.07454661500473854,4.589767688464477,6.419507440476191,4.219912500000002,8.178526304662228,0.49989257991546765,0.43164352465343353,7.45451045781374,7.765116708974044,6.262095648795366,5.564441145833332,4.171640104166664

benchmark/frontier-composites.json

@@ -0,0 +1,639 @@
+{
+  "dataset": "WSB",
+  "n_prompts": 192,
+  "source_sha256": "579ffb6b9b069f6d3cdd32a76788998ec633a12426a0ebb7c9f83e6fb0d5b1fc",
+  "reference_systems": [
+    "Suno v5",
+    "Suno v4.5",
+    "Suno v5.5",
+    "Suno v6",
+    "Suno v6 Wild",
+    "MiniMax Music 2.6",
+    "Mureka 9",
+    "YuE 1",
+    "SongBloom",
+    "LeVo 2",
+    "ACE-Step 1.5",
+    "HeartMuLa",
+    "DiffRhythm 2",
+    "Muse",
+    "MiniMax Music 3"
+  ],
+  "normalization": "z = (system mean - reference mean) / reference population std",
+  "reference_statistics": {
+    "songbench_global_avg": {
+      "mean": 6.121283377976191,
+      "population_std": 0.7357457614725659
+    },
+    "songeval_global_avg": {
+      "mean": 4.015471256944445,
+      "population_std": 0.40701956006795303
+    },
+    "songbench_musicality": {
+      "mean": 5.265866701388889,
+      "population_std": 0.7053243399537521
+    },
+    "songeval_musicality": {
+      "mean": 3.9703476041666663,
+      "population_std": 0.4051162346821886
+    },
+    "mulan": {
+      "mean": 0.4186944833891175,
+      "population_std": 0.08094623772340859
+    },
+    "allmusiccaps": {
+      "mean": 0.3533851072454733,
+      "population_std": 0.06820180734302435
+    },
+    "control_overall": {
+      "mean": 4.248089863722948,
+      "population_std": 0.4756164261685128
+    }
+  },
+  "quality_weights": {
+    "songbench": 0.6666666666666666,
+    "songeval": 0.33333333333333337
+  },
+  "alignment_weights": {
+    "mulan": 0.3333333333333333,
+    "allmusiccaps": 0.3333333333333333,
+    "control_overall": 0.3333333333333333
+  },
+  "values": {
+    "YuE2": {
+      "quality_global_avg": 0.7552819777715396,
+      "quality_musicality": 0.8078339775660601,
+      "alignment": 0.9210758825216073,
+      "audiobox_pq": 8.25979095697403
+    },
+    "YuE2 (best-of-8)": {
+      "quality_global_avg": 0.9926775311951548,
+      "quality_musicality": 1.1764900036325572,
+      "alignment": 0.8913402282808791,
+      "audiobox_pq": 8.271365446348986
+    },
+    "ACE-Step 1.5": {
+      "quality_global_avg": -0.2376035047550664,
+      "quality_musicality": -0.23714600301672967,
+      "alignment": 0.47315715541685155,
+      "audiobox_pq": 8.051833018660545
+    },
+    "DiffRhythm 2": {
+      "quality_global_avg": -1.1980739812149017,
+      "quality_musicality": -1.1559112521857333,
+      "alignment": -0.41604199452568785,
+      "audiobox_pq": 7.978225273390611
+    },
+    "HeartMuLa": {
+      "quality_global_avg": 0.5544151508643054,
+      "quality_musicality": 0.6806476331364909,
+      "alignment": -1.0459382238546173,
+      "audiobox_pq": 8.293305036922296
+    },
+    "LeVo 2": {
+      "quality_global_avg": 0.19076064388585245,
+      "quality_musicality": 0.19203107542441739,
+      "alignment": -0.8946697129809009,
+      "audiobox_pq": 8.396623315910498
+    },
+    "MiniMax Music 2.6": {
+      "quality_global_avg": 0.24999255629041012,
+      "quality_musicality": 0.2385294260172236,
+      "alignment": 0.317708040770442,
+      "audiobox_pq": 8.171058195332686
+    },
+    "MiniMax Music 3": {
+      "quality_global_avg": 0.21521779684943682,
+      "quality_musicality": 0.13768736380561403,
+      "alignment": 0.06167958802908772,
+      "audiobox_pq": 8.28245102117459
+    },
+    "Mureka 9": {
+      "quality_global_avg": 1.063838458020569,
+      "quality_musicality": 1.0622475778213865,
+      "alignment": 0.6353722959962361,
+      "audiobox_pq": 8.022609589000544
+    },
+    "Muse": {
+      "quality_global_avg": -0.2640126435903063,
+      "quality_musicality": -0.28400814299371513,
+      "alignment": -0.027277572405822206,
+      "audiobox_pq": 8.051745663086573
+    },
+    "SongBloom": {
+      "quality_global_avg": -2.3727929454241776,
+      "quality_musicality": -2.3469029518895956,
+      "alignment": -2.25355622224482,
+      "audiobox_pq": 8.153916046023369
+    },
+    "Suno v4.5": {
+      "quality_global_avg": 0.8114848653568392,
+      "quality_musicality": 0.822345947368047,
+      "alignment": 0.6266794053102317,
+      "audiobox_pq": 8.254062737027803
+    },
+    "Suno v5": {
+      "quality_global_avg": 0.9607654088358881,
+      "quality_musicality": 0.9616318815497118,
+      "alignment": 1.1513277335650094,
+      "audiobox_pq": 8.169838989774385
+    },
+    "Suno v5.5": {
+      "quality_global_avg": 0.7014955760788759,
+      "quality_musicality": 0.6606381030854666,
+      "alignment": 0.7992264544775121,
+      "audiobox_pq": 8.195489337046942
+    },
+    "Suno v6": {
+      "quality_global_avg": 0.6341407893639396,
+      "quality_musicality": 0.6097852138267854,
+      "alignment": 0.9417981546473502,
+      "audiobox_pq": 8.129587392012278
+    },
+    "Suno v6 Wild": {
+      "quality_global_avg": 0.43765333454931554,
+      "quality_musicality": 0.44783537273294216,
+      "alignment": 0.9563182017109547,
+      "audiobox_pq": 8.178526304662228
+    },
+    "YuE 1": {
+      "quality_global_avg": -1.7472815051109758,
+      "quality_musicality": -1.7894112446823107,
+      "alignment": -1.3257833039118254,
+      "audiobox_pq": 7.868339642882347
+    }
+  },
+  "sensitivity": [
+    {
+      "variant": "global_avg",
+      "songbench_weight": 0.5,
+      "best_public": "HeartMuLa",
+      "yue2_minus_best_public": -0.02710930368588904,
+      "rank_yue2": 6,
+      "rank_bo8": 3,
+      "ranking": [
+        "Mureka 9",
+        "Suno v5",
+        "YuE2 (best-of-8)",
+        "Suno v4.5",
+        "HeartMuLa",
+        "YuE2",
+        "Suno v6",
+        "Suno v5.5",
+        "Suno v6 Wild",
+        "MiniMax Music 2.6",
+        "MiniMax Music 3",
+        "LeVo 2",
+        "ACE-Step 1.5",
+        "Muse",
+        "DiffRhythm 2",
+        "YuE 1",
+        "SongBloom"
+      ]
+    },
+    {
+      "variant": "global_avg",
+      "songbench_weight": 0.6,
+      "best_public": "HeartMuLa",
+      "yue2_minus_best_public": 0.10967637466998481,
+      "rank_yue2": 5,
+      "rank_bo8": 2,
+      "ranking": [
+        "Mureka 9",
+        "YuE2 (best-of-8)",
+        "Suno v5",
+        "Suno v4.5",
+        "YuE2",
+        "Suno v5.5",
+        "Suno v6",
+        "HeartMuLa",
+        "Suno v6 Wild",
+        "MiniMax Music 2.6",
+        "MiniMax Music 3",
+        "LeVo 2",
+        "ACE-Step 1.5",
+        "Muse",
+        "DiffRhythm 2",
+        "YuE 1",
+        "SongBloom"
+      ]
+    },
+    {
+      "variant": "global_avg",
+      "songbench_weight": 0.6666666666666666,
+      "best_public": "HeartMuLa",
+      "yue2_minus_best_public": 0.20086682690723423,
+      "rank_yue2": 5,
+      "rank_bo8": 2,
+      "ranking": [
+        "Mureka 9",
+        "YuE2 (best-of-8)",
+        "Suno v5",
+        "Suno v4.5",
+        "YuE2",
+        "Suno v5.5",
+        "Suno v6",
+        "HeartMuLa",
+        "Suno v6 Wild",
+        "MiniMax Music 2.6",
+        "MiniMax Music 3",
+        "LeVo 2",
+        "ACE-Step 1.5",
+        "Muse",
+        "DiffRhythm 2",
+        "YuE 1",
+        "SongBloom"
+      ]
+    },
+    {
+      "variant": "global_avg",
+      "songbench_weight": 0.7,
+      "best_public": "HeartMuLa",
+      "yue2_minus_best_public": 0.24646205302585877,
+      "rank_yue2": 5,
+      "rank_bo8": 2,
+      "ranking": [
+        "Mureka 9",
+        "YuE2 (best-of-8)",
+        "Suno v5",
+        "Suno v4.5",
+        "YuE2",
+        "Suno v5.5",
+        "Suno v6",
+        "HeartMuLa",
+        "Suno v6 Wild",
+        "MiniMax Music 2.6",
+        "MiniMax Music 3",
+        "LeVo 2",
+        "ACE-Step 1.5",
+        "Muse",
+        "DiffRhythm 2",
+        "YuE 1",
+        "SongBloom"
+      ]
+    },
+    {
+      "variant": "global_avg",
+      "songbench_weight": 0.75,
+      "best_public": "HeartMuLa",
+      "yue2_minus_best_public": 0.3148548922037958,
+      "rank_yue2": 5,
+      "rank_bo8": 2,
+      "ranking": [
+        "Mureka 9",
+        "YuE2 (best-of-8)",
+        "Suno v5",
+        "Suno v4.5",
+        "YuE2",
+        "Suno v5.5",
+        "Suno v6",
+        "HeartMuLa",
+        "Suno v6 Wild",
+        "MiniMax Music 2.6",
+        "MiniMax Music 3",
+        "LeVo 2",
+        "ACE-Step 1.5",
+        "Muse",
+        "DiffRhythm 2",
+        "YuE 1",
+        "SongBloom"
+      ]
+    },
+    {
+      "variant": "global_avg",
+      "songbench_weight": 0.8,
+      "best_public": "HeartMuLa",
+      "yue2_minus_best_public": 0.3832477313817329,
+      "rank_yue2": 5,
+      "rank_bo8": 2,
+      "ranking": [
+        "Mureka 9",
+        "YuE2 (best-of-8)",
+        "Suno v5",
+        "Suno v4.5",
+        "YuE2",
+        "Suno v5.5",
+        "Suno v6",
+        "Suno v6 Wild",
+        "HeartMuLa",
+        "MiniMax Music 2.6",
+        "LeVo 2",
+        "MiniMax Music 3",
+        "ACE-Step 1.5",
+        "Muse",
+        "DiffRhythm 2",
+        "YuE 1",
+        "SongBloom"
+      ]
+    },
+    {
+      "variant": "musicality",
+      "songbench_weight": 0.5,
+      "best_public": "HeartMuLa",
+      "yue2_minus_best_public": -0.10071426090411806,
+      "rank_yue2": 6,
+      "rank_bo8": 1,
+      "ranking": [
+        "YuE2 (best-of-8)",
+        "Mureka 9",
+        "Suno v5",
+        "HeartMuLa",
+        "Suno v4.5",
+        "YuE2",
+        "Suno v6",
+        "Suno v5.5",
+        "Suno v6 Wild",
+        "MiniMax Music 2.6",
+        "LeVo 2",
+        "MiniMax Music 3",
+        "ACE-Step 1.5",
+        "Muse",
+        "DiffRhythm 2",
+        "YuE 1",
+        "SongBloom"
+      ]
+    },
+    {
+      "variant": "musicality",
+      "songbench_weight": 0.6,
+      "best_public": "HeartMuLa",
+      "yue2_minus_best_public": 0.036026102296094376,
+      "rank_yue2": 5,
+      "rank_bo8": 1,
+      "ranking": [
+        "YuE2 (best-of-8)",
+        "Mureka 9",
+        "Suno v5",
+        "Suno v4.5",
+        "YuE2",
+        "HeartMuLa",
+        "Suno v5.5",
+        "Suno v6",
+        "Suno v6 Wild",
+        "MiniMax Music 2.6",
+        "LeVo 2",
+        "MiniMax Music 3",
+        "ACE-Step 1.5",
+        "Muse",
+        "DiffRhythm 2",
+        "YuE 1",
+        "SongBloom"
+      ]
+    },
+    {
+      "variant": "musicality",
+      "songbench_weight": 0.6666666666666666,
+      "best_public": "HeartMuLa",
+      "yue2_minus_best_public": 0.12718634442956922,
+      "rank_yue2": 5,
+      "rank_bo8": 1,
+      "ranking": [
+        "YuE2 (best-of-8)",
+        "Mureka 9",
+        "Suno v5",
+        "Suno v4.5",
+        "YuE2",
+        "HeartMuLa",
+        "Suno v5.5",
+        "Suno v6",
+        "Suno v6 Wild",
+        "MiniMax Music 2.6",
+        "LeVo 2",
+        "MiniMax Music 3",
+        "ACE-Step 1.5",
+        "Muse",
+        "DiffRhythm 2",
+        "YuE 1",
+        "SongBloom"
+      ]
+    },
+    {
+      "variant": "musicality",
+      "songbench_weight": 0.7,
+      "best_public": "HeartMuLa",
+      "yue2_minus_best_public": 0.1727664654963067,
+      "rank_yue2": 5,
+      "rank_bo8": 1,
+      "ranking": [
+        "YuE2 (best-of-8)",
+        "Mureka 9",
+        "Suno v5",
+        "Suno v4.5",
+        "YuE2",
+        "Suno v5.5",
+        "HeartMuLa",
+        "Suno v6",
+        "Suno v6 Wild",
+        "MiniMax Music 2.6",
+        "LeVo 2",
+        "MiniMax Music 3",
+        "ACE-Step 1.5",
+        "Muse",
+        "DiffRhythm 2",
+        "YuE 1",
+        "SongBloom"
+      ]
+    },
+    {
+      "variant": "musicality",
+      "songbench_weight": 0.75,
+      "best_public": "HeartMuLa",
+      "yue2_minus_best_public": 0.24113664709641314,
+      "rank_yue2": 4,
+      "rank_bo8": 1,
+      "ranking": [
+        "YuE2 (best-of-8)",
+        "Mureka 9",
+        "Suno v5",
+        "YuE2",
+        "Suno v4.5",
+        "Suno v5.5",
+        "Suno v6",
+        "HeartMuLa",
+        "Suno v6 Wild",
+        "MiniMax Music 2.6",
+        "LeVo 2",
+        "MiniMax Music 3",
+        "ACE-Step 1.5",
+        "Muse",
+        "DiffRhythm 2",
+        "YuE 1",
+        "SongBloom"
+      ]
+    },
+    {
+      "variant": "musicality",
+      "songbench_weight": 0.8,
+      "best_public": "HeartMuLa",
+      "yue2_minus_best_public": 0.30950682869651935,
+      "rank_yue2": 4,
+      "rank_bo8": 1,
+      "ranking": [
+        "YuE2 (best-of-8)",
+        "Mureka 9",
+        "Suno v5",
+        "YuE2",
+        "Suno v4.5",
+        "Suno v5.5",
+        "Suno v6",
+        "HeartMuLa",
+        "Suno v6 Wild",
+        "MiniMax Music 2.6",
+        "LeVo 2",
+        "MiniMax Music 3",
+        "ACE-Step 1.5",
+        "Muse",
+        "DiffRhythm 2",
+        "YuE 1",
+        "SongBloom"
+      ]
+    }
+  ],
+  "display_normalization": {
+    "formula": "index = 10 + 80 * (composite - min) / (max - min)",
+    "display_range": [
+      10,
+      90
+    ],
+    "axis_range": [
+      0,
+      100
+    ],
+    "endpoint_systems": [
+      "YuE2",
+      "YuE2 (best-of-8)",
+      "ACE-Step 1.5",
+      "DiffRhythm 2",
+      "HeartMuLa",
+      "LeVo 2",
+      "MiniMax Music 2.6",
+      "MiniMax Music 3",
+      "Mureka 9",
+      "Muse",
+      "SongBloom",
+      "Suno v4.5",
+      "Suno v5",
+      "Suno v5.5",
+      "Suno v6",
+      "Suno v6 Wild",
+      "YuE 1"
+    ],
+    "bounds": {
+      "quality_global_avg": {
+        "min": -2.3727929454241776,
+        "max": 1.063838458020569
+      },
+      "quality_musicality": {
+        "min": -2.3469029518895956,
+        "max": 1.1764900036325572
+      },
+      "alignment": {
+        "min": -2.25355622224482,
+        "max": 1.1513277335650094
+      }
+    },
+    "scope": "Observed extrema across the frozen 17-setting WSB comparison."
+  },
+  "display_values": {
+    "YuE2": {
+      "quality_global_avg": 82.81723422675485,
+      "quality_musicality": 81.6295223219151,
+      "alignment": 84.59008050713697
+    },
+    "YuE2 (best-of-8)": {
+      "quality_global_avg": 88.34347258180588,
+      "quality_musicality": 90.0,
+      "alignment": 83.89142164823544
+    },
+    "ACE-Step 1.5": {
+      "quality_global_avg": 59.70424092683039,
+      "quality_musicality": 57.90284763591369,
+      "alignment": 74.06593383035025
+    },
+    "DiffRhythm 2": {
+      "quality_global_avg": 37.34582389095981,
+      "quality_musicality": 37.04192724997628,
+      "alignment": 53.17361182506653
+    },
+    "HeartMuLa": {
+      "quality_global_avg": 78.1413338271742,
+      "quality_musicality": 78.7417071724812,
+      "alignment": 38.373783402036175
+    },
+    "LeVo 2": {
+      "quality_global_avg": 69.67596261246808,
+      "quality_musicality": 67.6474792193652,
+      "alignment": 41.9279370903721
+    },
+    "MiniMax Music 2.6": {
+      "quality_global_avg": 71.0547991637534,
+      "quality_musicality": 68.70324225641005,
+      "alignment": 70.41355409197678
+    },
+    "MiniMax Music 3": {
+      "quality_global_avg": 70.24529112268468,
+      "quality_musicality": 66.41358422542463,
+      "alignment": 64.3979962976035
+    },
+    "Mureka 9": {
+      "quality_global_avg": 90.0,
+      "quality_musicality": 87.40608152985898,
+      "alignment": 77.87728582201137
+    },
+    "Muse": {
+      "quality_global_avg": 59.08947290000577,
+      "quality_musicality": 56.83882462017735,
+      "alignment": 62.30788899081859
+    },
+    "SongBloom": {
+      "quality_global_avg": 10.0,
+      "quality_musicality": 10.0,
+      "alignment": 10.0
+    },
+    "Suno v4.5": {
+      "quality_global_avg": 84.12555929249136,
+      "quality_musicality": 81.95902220989649,
+      "alignment": 77.67304060722402
+    },
+    "Suno v5": {
+      "quality_global_avg": 87.60060275113905,
+      "quality_musicality": 85.12156322510432,
+      "alignment": 90.0
+    },
+    "Suno v5.5": {
+      "quality_global_avg": 81.56516159216855,
+      "quality_musicality": 78.28738305243859,
+      "alignment": 81.72714762306776
+    },
+    "Suno v6": {
+      "quality_global_avg": 79.9972358228254,
+      "quality_musicality": 77.13274853053025,
+      "alignment": 85.0769639932043
+    },
+    "Suno v6 Wild": {
+      "quality_global_avg": 75.42328111548792,
+      "quality_musicality": 73.45561474186167,
+      "alignment": 85.41812210025412
+    },
+    "YuE 1": {
+      "quality_global_avg": 24.561036477434577,
+      "quality_musicality": 22.65806486519848,
+      "alignment": 31.798638200280863
+    }
+  },
+  "per_song_validation": {
+    "systems": 17,
+    "records": 3264,
+    "absolute_tolerance": 1e-10
+  },
+  "interpretation": [
+    "Descriptive standardized composites, not percentages or validated new evaluators.",
+    "Observed extrema map to 10 and 90 on 0–100 axes, leaving symmetric display margins.",
+    "All 15 external baselines, including HeartMuLa and both Suno v6 variants, define one frozen WSB reference.",
+    "YuE2 and Bo8 are excluded from the 15-system z-score standardization reference.",
+    "Q3O retains recorded prompt weights, which differ on some selected records.",
+    "Evaluator reuse and candidate-selection protocols remain as documented in Tables 1–2."
+  ],
+  "source": "benchmark-results.csv",
+  "snapshot": "2026-09-12"
+}

benchmark/results.md

@@ -0,0 +1,41 @@
+# WildSongBench results and evaluation scope
+
+The reported results describe generation with symbolic planning under the recorded automatic-evaluation protocols. They support **frontier quality: YuE2 is competitive with Suno v5/v6**. They do not establish universal metric superiority or human preference.
+
+The [interactive demo results](https://map-yue2.github.io/#model-overview), [full WSB results CSV](benchmark-results.csv), and [WildSongBench dataset](https://huggingface.co/datasets/m-a-p/WildSongBench) provide the public result and benchmark resources.
+
+## September 12, 2026 comparison
+
+The September 12, 2026 comparison covers **192 prompts and 17 settings**: eight public comparison systems, seven proprietary systems, YuE2, and YuE2 (best-of-8). All displayed aggregate metrics cover the same 192 selected outputs per setting.
+
+| Setting | SongBench Avg ↑ | SB Musicality ↑ | SongEval Avg ↑ | SE Musicality ↑ | AudioBox PQ ↑ | MuLan ↑ | AllMusicCaps ↑ | Q3O ↑ | PER ↓ |
+|---|---:|---:|---:|---:|---:|---:|---:|---:|---:|
+| **YuE2 (best-of-8)** | 6.9632 | 6.2666 | 4.2960 | 4.2506 | 8.2714 | 0.5051 | 0.3980 | 4.7009 | 9.79% |
+| Mureka 9 | 6.9377 | 6.0488 | 4.4111 | 4.3619 | 8.0226 | 0.4394 | 0.4102 | 4.6368 | 11.69% |
+| Suno v5 | 6.8721 | 5.9918 | 4.3579 | 4.3051 | 8.1698 | 0.5428 | 0.4353 | 4.5907 | 8.10% |
+| **YuE2** | 6.7316 | 5.9075 | 4.2625 | 4.2151 | 8.2598 | 0.5068 | 0.4054 | 4.6819 | 8.44% |
+| Suno v5.5 | 6.7150 | 5.8087 | 4.2152 | 4.1497 | 8.1955 | 0.5089 | 0.3917 | 4.5914 | 5.96% |
+| Suno v4.5 | 6.6995 | 5.8317 | 4.3666 | 4.3198 | 8.2541 | 0.5022 | 0.3873 | 4.4149 | 5.80% |
+| Suno v6 | 6.5562 | 5.6558 | 4.3086 | 4.2635 | 8.1296 | 0.4916 | 0.4305 | 4.6258 | 7.58% |
+| Suno v6 Wild | 6.4195 | 5.5644 | 4.2199 | 4.1716 | 8.1785 | 0.4999 | 0.4316 | 4.5898 | 7.45% |
+| LeVo 2 | 6.3247 | 5.4590 | 4.0234 | 3.9819 | 8.3966 | 0.3542 | 0.2680 | 3.9458 | 26.12% |
+| MiniMax Music 2.6 | 6.3222 | 5.4437 | 4.0985 | 4.0560 | 8.1711 | 0.4251 | 0.3670 | 4.5688 | 24.55% |
+| MiniMax Music 3 | 6.2830 | 5.3482 | 4.0994 | 4.0431 | 8.2825 | 0.3928 | 0.3609 | 4.4362 | 6.27% |
+| HeartMuLa | 6.2483 | 5.4963 | 4.5519 | 4.5329 | 8.2933 | 0.3823 | 0.2786 | 3.4907 | 10.71% |
+| Muse | 6.0349 | 5.1692 | 3.7887 | 3.7362 | 8.0517 | 0.3937 | 0.3466 | 4.4038 | 33.42% |
+| ACE-Step 1.5 | 6.0118 | 5.1588 | 3.8465 | 3.8051 | 8.0518 | 0.4372 | 0.3869 | 4.5809 | 7.46% |
+| DiffRhythm 2 | 5.2428 | 4.4775 | 3.5245 | 3.4711 | 7.9782 | 0.3782 | 0.3255 | 4.0870 | 18.41% |
+| YuE 1 | 4.9165 | 4.0847 | 3.2150 | 3.1524 | 7.8683 | 0.2623 | 0.2882 | 3.7301 | 36.38% |
+| SongBloom | 4.2350 | 3.4493 | 3.2051 | 3.2048 | 8.1539 | 0.2697 | 0.1926 | 3.0287 | 19.19% |
+
+SongBench Avg is the mean of seven dimensions. SongEval Avg is the mean of five dimensions from a separate automatic quality evaluator. SB Musicality and SE Musicality report the respective musicality dimensions. AudioBox PQ measures production quality; MuLan and AllMusicCaps assess text/audio alignment; prompt control uses Q3O on a 0–5 scale. PER is phoneme error rate, for which lower is better.
+
+**Candidate selection.** Standard YuE2 selects the lower-PER candidate from two generations. Best-of-8 selects by SongBench Musicality, then prompt control, then PER. Each candidate's PER uses the lowest PER from four ASR passes. This selection uses a SongBench dimension and is not equivalent to one unselected pipeline call. Prompt-control weights differ on 10 of 192 prompts between the two selected YuE2 settings.
+
+Public baselines, Suno v6, and Suno v6 Wild use two candidates and four ASR passes per candidate, followed by lower-PER selection; earlier proprietary systems retain their delivered-candidate protocols. MiniMax Music 3 uses its official caption rewriter and is classified as a public model because its weights are released and the evaluated campaign uses them locally. SongBloom uses a fixed audio prompt. These are documented system comparisons, not matched-compute experiments.
+
+Both YuE2 settings use melody-and-chord planning and the verified evaluation decoder distributed as **[YuE2-Vae-legacy](https://huggingface.co/m-a-p/YuE2-Vae-legacy)**. Default listening uses **[YuE2-Vae](https://huggingface.co/m-a-p/YuE2-Vae)**. Keep their audio separate; use the same cached acoustic latents for decoder comparisons. The release names determine these roles, not the everyday meaning of “legacy.”
+
+**What the lead means.** YuE2 (best-of-8) has the highest observed SongBench Avg, 6.9632; the highest proprietary mean is Mureka 9 at 6.9377, while Suno v5 scores 6.8721, Suno v6 scores 6.5562, and Suno v6 Wild scores 6.4195. The small gaps are descriptive, not claims of statistical significance. Different systems lead other metrics: Suno v6 has higher SongEval scores than both YuE2 settings, and both v6 variants have lower PER and higher AllMusicCaps scores. The unqualified YuE2 setting scores 6.7316 and is already within the proprietary quality range.
+
+The overview figure combines SongBench and SongEval into a normalized song-quality index and MuLan, AllMusicCaps, and prompt control into a normalized text-alignment index. These axes are comparison indices, not percentages of correct output. Bubble area indicates AudioBox PQ; outlined points are Pareto-optimal on the two plotted axes. The 15 external baselines define the z-score reference; quality weights SongBench Avg and SongEval Avg at 2:1, while alignment weights its three metrics equally. Each axis maps the observed extrema across all 17 settings to 10 and 90. [Figure data and normalization](frontier-composites.json) · [Full-precision CSV](benchmark-results.csv) · [JSON](benchmark-results.json).