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Submissions
| Submission
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Title
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PDF
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Authors
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| Baseline: CN1
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QM Key Detector (QM Vamp Plugins 1.7.1)
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Link
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| ChordyV-Key
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ChordyV: A Symbolic Harmonic Progression and Tonal Audit System for Audio Key Detection
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PDF
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Mulfie Ansyori Sofyan
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| Chord-LLM
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Key Detection via LLM Processing of Chord Recognizer Outputs
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PDF
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Jeffrey Gordon
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| Hurliman_K10
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K10: A Compact Convolutional Network for Global Key Estimation
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PDF
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John Hurliman
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| MusicFM-MLP
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Fully Fine-Tuned MusicFM with a Lightweight MLP Head for Global Key Detection
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PDF
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Xinwei Jiang, Yaolong Ju
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| RESON
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An Unsupervised Spectral Pitch-Class Baseline for Audio Key Detection
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PDF
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Ziyi Xu
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| UFAL-PMCG-music-flamingo-reasoning-full
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UFAL-PMCG Systems at the MIREX 2026 Audio Key Detection Challenge: Audio-LLMs Are No Longer Off-Key
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PDF
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Tomáš Sourada, Jan Hajič jr.
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| UFAL-PMCG-qwen3-omni-30b-direct-full
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UFAL-PMCG Systems at the MIREX 2026 Audio Key Detection Challenge: Audio-LLMs Are No Longer Off-Key
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PDF
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Tomáš Sourada, Jan Hajič jr.
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| UFAL-PMCG-qwen25-omni-7b-direct-full
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UFAL-PMCG Systems at the MIREX 2026 Audio Key Detection Challenge: Audio-LLMs Are No Longer Off-Key
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PDF
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Tomáš Sourada, Jan Hajič jr.
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Test Sets
- GiantSteps Key: 604 two-minute excerpts of electronic dance music (the MIREX key test set since 2017).
- GTZAN: the 837 GTZAN excerpts with a single key in the annotations of Kraft and Lerch (classical and excerpts marked as modulating or unknown are excluded).
- FMAKv2 (new in 2026): 5,489 full-length Creative Commons songs of the Free Music Archive in 17 genres, one global key each, annotated by an expert (FMAKv2, Kong et al., ISMIR 2024; audio from FMAK).
- Yamaha_JPop: A private dataset annotated by Yamaha Corporation (174 JPOP songs).
- Yamaha_Balanced: A private dataset annotated by Yamaha Corporation (185 songs). While it is still biased towards JPOP songs, the dataset covers a wider range of genres: J.Pop (10.37%), Rock (10.37%), J.Enka (10.37%), J.Kayoukyoku (10.37%), Soundtrack (10.37%), Western Pop (10.37%), Children's Song (10.37%), R&B (6.22%), Hiphop (4.56%), Jazz (2.49%), Dance (2.49%), World (2.07%), Techno (1.24%), Easy listening (1.24%), J.Minyou (1.24%), Others (5.81%).
Results
Weighted score: 1 for the correct key, 0.5 for a perfect fifth, 0.3 for the relative key, 0.2 for the parallel key, 0 otherwise. Weighted (sym.) gives 0.5 to a fifth above or below the reference (as in MIREX 2017–2019); Weighted (asym.) only to a fifth above (mir_eval 0.8.2 default). The other columns are the percentage of files in each category.
For the two weighted scores and Correct, the best result is shown in bold and the second best underlined.
GiantSteps Key
| Group
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Weighted (sym.)
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Weighted (asym.)
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Correct
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Fifth up
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Fifth down
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Relative
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Parallel
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Chromatic
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Other
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| Chord-LLM †
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74.40
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72.42
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68.05
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3.31
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3.97
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5.96
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4.64
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3.31
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10.76
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| ChordyV-Key
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39.74
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35.68
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28.81
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2.98
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8.11
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10.10
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11.76
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1.99
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36.26
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| Hurliman_K10
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74.57
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72.91
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67.88
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4.30
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3.31
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6.95
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3.97
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3.15
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10.43
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| MusicFM-MLP
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77.62
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76.37
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72.19
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4.30
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2.48
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4.14
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3.97
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3.97
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8.94
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| RESON
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42.30
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41.23
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29.30
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13.08
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2.15
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5.79
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18.21
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2.48
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28.97
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| UFAL-PMCG-music-flamingo-reasoning-full
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60.17
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59.17
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52.15
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3.15
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1.99
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10.76
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11.09
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1.32
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19.54
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| UFAL-PMCG-qwen25-omni-7b-direct-full
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56.54
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53.23
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45.86
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8.94
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6.62
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7.78
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2.81
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1.99
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25.99
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| UFAL-PMCG-qwen3-omni-30b-direct-full
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70.94
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68.79
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62.91
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6.13
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4.30
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6.29
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4.64
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2.48
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13.24
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| Baseline: CN1
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50.53
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46.97
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39.74
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4.80
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7.12
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13.24
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4.30
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2.65
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28.15
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GTZAN
| Group
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Weighted (sym.)
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Weighted (asym.)
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Correct
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Fifth up
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Fifth down
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Relative
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Parallel
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Chromatic
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Other
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| Chord-LLM †
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73.76
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72.09
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67.03
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3.70
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3.35
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2.51
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12.31
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0.84
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10.27
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| ChordyV-Key
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48.64
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43.44
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36.44
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5.73
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10.39
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5.26
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12.78
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1.67
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27.72
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| Hurliman_K10
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72.03
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70.24
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64.64
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4.90
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3.58
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5.02
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8.24
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1.79
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11.83
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| MusicFM-MLP
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73.42
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71.80
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66.91
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2.15
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3.23
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3.82
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13.38
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1.19
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9.32
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| RESON
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48.48
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47.35
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34.29
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16.97
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2.27
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5.62
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14.46
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2.63
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23.78
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| UFAL-PMCG-music-flamingo-reasoning-full
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54.15
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52.77
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44.68
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4.90
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2.75
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7.17
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17.44
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0.36
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22.70
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| UFAL-PMCG-qwen25-omni-7b-direct-full
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55.94
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52.47
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45.04
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7.53
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6.93
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7.53
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7.05
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1.55
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24.37
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| UFAL-PMCG-qwen3-omni-30b-direct-full
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67.60
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64.43
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58.90
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4.54
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6.33
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5.62
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7.89
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2.87
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13.86
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| Baseline: CN1
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47.08
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43.14
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36.68
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4.18
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7.89
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8.84
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8.60
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6.69
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27.12
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FMAKv2
| Group
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Weighted (sym.)
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Weighted (asym.)
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Correct
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Fifth up
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Fifth down
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Relative
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Parallel
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Chromatic
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Other
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| Chord-LLM †
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n/a
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n/a
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n/a
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n/a
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n/a
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n/a
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n/a
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n/a
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n/a
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| ChordyV-Key
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53.40
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47.11
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41.12
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5.21
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12.57
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8.11
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4.77
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1.95
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26.27
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| Hurliman_K10
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72.43
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70.33
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64.40
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5.56
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4.21
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7.62
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4.32
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1.55
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12.35
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| MusicFM-MLP
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75.63
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73.79
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68.46
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4.39
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3.68
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8.31
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3.21
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2.17
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9.78
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| RESON
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56.66
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55.45
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43.58
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15.49
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2.42
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8.09
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8.53
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1.13
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20.77
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| UFAL-PMCG-music-flamingo-reasoning-full
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69.52
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67.41
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61.14
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5.72
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4.23
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8.58
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4.15
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1.82
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14.36
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| UFAL-PMCG-qwen25-omni-7b-direct-full
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66.00
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63.25
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56.33
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6.74
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5.50
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9.75
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3.12
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2.00
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16.56
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| UFAL-PMCG-qwen3-omni-30b-direct-full
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74.86
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72.69
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67.41
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4.28
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4.35
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7.76
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4.04
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1.88
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10.28
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| Baseline: CN1
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63.02
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58.91
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52.94
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4.01
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8.22
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10.49
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4.10
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3.15
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17.09
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YAMAHA_Balanced
| Group
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Weighted (sym.)
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Weighted (asym.)
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Correct
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Fifth up
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Fifth down
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Relative
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Parallel
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Chromatic
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Other
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| Chord-LLM †
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n/a
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n/a
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n/a
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n/a
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n/a
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n/a
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n/a
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n/a
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n/a
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| ChordyV-Key
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| Hurliman_K10
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| MusicFM-MLP
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| RESON
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| UFAL-PMCG-music-flamingo-reasoning-full
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| UFAL-PMCG-qwen25-omni-7b-direct-full
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| UFAL-PMCG-qwen3-omni-30b-direct-full
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| Baseline: CN1
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YAMAHA_JPop
| Group
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Weighted (sym.)
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Weighted (asym.)
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Correct
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Fifth up
|
Fifth down
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Relative
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Parallel
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Chromatic
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Other
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| Chord-LLM †
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n/a
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n/a
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n/a
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n/a
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n/a
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n/a
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n/a
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n/a
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n/a
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| ChordyV-Key
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| Hurliman_K10
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| MusicFM-MLP
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| RESON
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| UFAL-PMCG-music-flamingo-reasoning-full
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| UFAL-PMCG-qwen25-omni-7b-direct-full
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| UFAL-PMCG-qwen3-omni-30b-direct-full
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| Baseline: CN1
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Notes
- † Chord-LLM is not evaluated on FMAKv2: according to its extended abstract, the system was developed and tuned on FMAKv2. It uses an online API at inference time and could not be run on the Yamaha sets.
- MusicFM-MLP was trained on the Hooktheory annotations released with SheetSage, which may overlap with some popular song datasets to a small extent.
