signalign-bench v0.1

README.md

@@ -0,0 +1,126 @@
+---
+license: other
+license_name: per-track-cc
+license_details: >-
+  Word timing annotations derive from JamendoLyrics and carry each song's
+  original Creative Commons license (BY / BY-SA / BY-ND / BY-NC / BY-NC-SA /
+  BY-NC-ND — see the `license` field per record). Difficulty bucket
+  annotations (buckets.csv) are original work released under CC-BY-4.0.
+  Audio is NOT redistributed here; fetch it from the jamendolyrics dataset.
+task_categories:
+- automatic-speech-recognition
+language:
+- en
+- fr
+- de
+- es
+tags:
+- music
+- lyrics
+- alignment
+- singing
+- benchmark
+- evaluation
+pretty_name: signalign-bench
+size_categories:
+- n<1K
+---
+
+# signalign-bench v0.1
+
+**The first difficulty-bucketed word-level lyrics alignment benchmark for
+sung vocals.**
+
+Existing lyrics-alignment evaluation reports one blended number. Singing
+fails aligners in *different ways* — fast rap, melisma, held notes, vocals
+buried in the mix — and a single number hides all of it. This benchmark
+tags every track with its dominant difficulty and reports metrics per
+bucket.
+
+Maintained at: https://github.com/alcadramin/signalign (evaluation harness,
+baselines, protocol).
+
+## Contents
+
+| File | What |
+|---|---|
+| `jamendolyrics.jsonl` | 79 tracks, word-level gold onsets/offsets, difficulty bucket, language, per-track license |
+| `buckets.csv` | The raw human bucket annotations (id → difficulty) |
+| `results/` | Baseline system scores (raw JSON, per bucket) |
+
+Schema per record: `id`, `audio_path` (relative to the
+[jamendolyrics](https://huggingface.co/datasets/jamendolyrics/jamendolyrics)
+dataset root), `duration`, `words[{text,start,end}]`, `difficulty`,
+`language`, `source`, `license`.
+
+## Difficulty buckets
+
+Assigned by ear by a human annotator (single annotator, v0.1 — annotator:
+alca, 2026-08-14). One dominant label per track; ties broken by fixed
+priority rap > melisma > held > buried.
+
+| bucket | tracks | meaning |
+|---|---|---|
+| clean | 46 | clear vocal, plain delivery |
+| buried | 13 | vocal low in the mix / heavy accompaniment |
+| rap | 11 | fast dense delivery |
+| melisma | 5 | multi-pitch syllables, vocal runs |
+| held | 4 | delivery built from long sustained notes |
+
+## Audio
+
+Not re-hosted. Word timings and buckets reference the
+[jamendolyrics/jamendolyrics](https://huggingface.co/datasets/jamendolyrics/jamendolyrics)
+dataset (same track ids / file names):
+
+```bash
+hf download jamendolyrics/jamendolyrics --repo-type dataset --local-dir data/jamendolyrics
+```
+
+Note: top-level `mp3/` entries in that download may materialize as text
+pointer files; real audio lives under `subsets/<lang>/mp3/`.
+
+## Metrics protocol
+
+Defined and implemented in
+[`eval/score.py`](https://github.com/alcadramin/signalign) (single source
+of truth): per-bucket **coverage**, **MAE**, **MedAE** (matched words, ms),
+**PCO@{100,200,300}ms** with all gold words as denominator (a dropped word
+counts as a miss). Word matching = LCS over normalized text.
+
+## Baseline results (v0.1)
+
+Demucs htdemucs vocal stem → forced alignment. Full tables in `results/`.
+
+| system | lyrics input | coverage | MAE | MedAE | PCO@100 |
+|---|---|---|---|---|---|
+| wav2vec2-base-960h (speech) + gold lyrics | yes | 1.00 | 150ms | 41ms | 79.7% |
+| WhisperX medium (ASR path) | no | 0.56 | 2187ms | 54ms | 38.9% |
+
+Per-bucket highlights: rap fails catastrophically not gradually (42ms MedAE,
+214ms MAE, lyrics-informed); melisma smears onsets (worst PCO@100); held
+notes are the easiest bucket, not the hardest; WhisperX drops 44% of sung
+words. Whisper language ID misdetected a German rap track as Khmer.
+
+## Limitations
+
+- Single annotator, track-level buckets (v0.2 targets segment-level).
+- 79 tracks, 4 European languages; no extreme-technique or a-cappella-rap
+  hard cases yet (planned additions).
+- Baseline alignments use an English character vocabulary after ASCII
+  folding for all languages.
+
+## Citation
+
+```
+@misc{signalign-bench,
+  title = {signalign-bench: a difficulty-bucketed word-level lyrics
+           alignment benchmark for sung vocals},
+  author = {alca},
+  year = {2026},
+  url = {https://huggingface.co/datasets/Alcadramin/signalign-bench}
+}
+```
+
+Please also cite the underlying JamendoLyrics dataset (Stoller et al.;
+Durand et al., see the jamendolyrics dataset card).

buckets.csv

@@ -0,0 +1,80 @@
+id,difficulty
+HILA_-_Give_Me_the_Same,clean
+Quentin_Hannappe_-_Keep_On,clean
+Songwriterz_-_Back_In_Time,clean
+Kinematic_-_Peyote,clean
+Avercage_-_Embers,buried
+Color_Out_-_Falling_Star,clean
+The.madpix.project_-_One_Way_Street,buried
+Wordsmith_-_The_Statement,rap
+JASON_MILLER_-_CROWD_PLEASER,rap
+Lower_Loveday_-_Is_It_Right_,clean
+Pure_Mids_-_The_Leader,clean
+Ridgway_-_Fire_Inside,rap
+Moon_I_Mean_-_Wrong_Concept,melisma
+Slingshot_Miracle_-_Whistler,clean
+The_Rinn_-_Voices__2017_Version_,clean
+Rxbyn_-_Bad_Side,rap
+Tom_Orlando_-_The_One__feat._Tina_G_,rap
+LUNABLIND_-_Vision__Radio_Edit_,clean
+Explosive_Ear_Candy_-_Like_The_Sun,clean
+Cortez_-_Feel__Stripped_,melisma
+1_Freak_-_Automatisch_Gekommen,buried
+Baila_-_Alfonso_Lugo,clean
+Besando_Sapos_-_Dream_Tabu,buried
+Bitte_beweg_dich_nicht_-_Bukto,buried
+Burn_Out_Man_-_Abendblau,clean
+Cafe_Jenseitz_Bebelstraße_-_kangaroo.musique,clean
+Capotes_à_un_Franc_-_elmanu,clean
+Caralibro_-_Vagos_Permanentes,clean
+CHRISTMAS_AVEC_TOI_-_imfreshyourepretty,clean
+CLUB_DESTINO__-_Pensando_en_ti_-_CLUB_DESTINO,clean
+Confession_-_Quesabe,rap
+Culture_&_Co._-_cool.cavemen,buried
+Da_wurdest_du_geboren_-_Alice_Tlustos_,held
+de_bonne_humeur_-_Le_Nez_Tordu,clean
+Der_Baum_-_Dienstag_is_Damensauna_(2),clean
+Der_Musiker_-_d-music,melisma
+dich_gehen_zu_sehn._-_Wingenbach_Frank,clean
+Die_Revolution_gehört_Dir!_-_partysahnen,clean
+Diosa_de_la_noche_-_Brunela_Crochenci,melisma
+10._Disparan_-_criatura,buried
+Drei_Nüsse_-_patrouille,clean
+Esencia_-_NandoMalo_,clean
+Fantasma_-_Los_Rombos,melisma
+Freifliegen_-_durch.dick.und.duenn,held
+Fußabdrücke_-_Andreas_Jachmann,clean
+Guayeteo_-_JhoyKing,rap
+Háblame_-_(Talk_to_me)_-_Brunela_Crochenci,clean
+Ich_kann_dich_nicht_vergessen_-_Wingenbach_Frank,buried
+Intentando_Destacar_-_Sundayers_,clean
+Intro_[Pulsschlag]_-_Zeugen_der_Leere_(2),buried
+Keine_Lust_-_Jonny_M,rap
+l'abandon_-_flo,clean
+La_rumba_del_coronavirus_-_Rich_Don_Jeri,clean
+Le_musée_d'air_contemporain_-_KPTN,clean
+Les_files_d'attente_-_Law',clean
+Libre_by_CybeR_AttaCK_-_CyberAttacK,buried
+Mère_nature_-_Law',clean
+Mes_Larmes_-_kobzx2z,rap
+¡Óyeme_tiburón!_-_Corrientes,held
+Yuanan_-_Miedo_-_Yuanan,clean
+Musik_-_Heiko,clean
+Palabras_-_Javier_Gomez_Bello,clean
+Pas_que_tes_pas_-_AZUL,clean
+Pluie_d'entre_deux_saisons_-_Midnight_Prefou,clean
+POIGNEE_DE_MAIN_-_Cabbac,clean
+Quiero_y_Puedo_-_Nacidos_de_la_Tierra,rap
+Schnodderdodder_-_Abendblau,clean
+Séculaire_feat._Nÿme_-_saru,rap
+Sehnsucht-Unplugged_-_REH-TORTE,buried
+SHANEY_23_feat._G1NA_G._x_In_den_Strassen_-_Shaney_23,clean
+Sin_miedo_-_Living_Camboya,clean
+te_amo_-_fabios_la_nueva_expresion_de_la_cancion,clean
+Te_Recuerdo_-_Wilson_Way,held
+DON_VALDES_-_Tu_sais_Man,clean
+Une_Vie_De_Roi_-_david,clean
+Vente_-_Fafarulo_Calabaza,buried
+Veränderung_-_doromusis,clean
+Le_royaume_des_glous_glous_-_Raoul_de_QSM,buried
+En_liberté_-_tom.leyak,clean

results/wav2vec2_base_gold_lyrics.json

@@ -0,0 +1,56 @@
+{
+  "clean": {
+    "n_words": 11257,
+    "coverage": 1.0,
+    "mae_ms": 133.6,
+    "medae_ms": 39.0,
+    "pco_100": 0.788,
+    "pco_200": 0.9129,
+    "pco_300": 0.9448
+  },
+  "buried": {
+    "n_words": 3181,
+    "coverage": 1.0,
+    "mae_ms": 149.2,
+    "medae_ms": 48.0,
+    "pco_100": 0.7793,
+    "pco_200": 0.9132,
+    "pco_300": 0.9481
+  },
+  "rap": {
+    "n_words": 4921,
+    "coverage": 1.0,
+    "mae_ms": 214.2,
+    "medae_ms": 42.0,
+    "pco_100": 0.8293,
+    "pco_200": 0.9309,
+    "pco_300": 0.9486
+  },
+  "melisma": {
+    "n_words": 1270,
+    "coverage": 1.0,
+    "mae_ms": 116.6,
+    "medae_ms": 53.5,
+    "pco_100": 0.7402,
+    "pco_200": 0.9126,
+    "pco_300": 0.9496
+  },
+  "held": {
+    "n_words": 951,
+    "coverage": 1.0,
+    "mae_ms": 65.5,
+    "medae_ms": 32.0,
+    "pco_100": 0.8801,
+    "pco_200": 0.9674,
+    "pco_300": 0.9769
+  },
+  "all": {
+    "n_words": 21580,
+    "coverage": 1.0,
+    "mae_ms": 150.3,
+    "medae_ms": 41.0,
+    "pco_100": 0.7974,
+    "pco_200": 0.9194,
+    "pco_300": 0.9479
+  }
+}

results/whisperx_medium.json

@@ -0,0 +1,56 @@
+{
+  "clean": {
+    "n_words": 11257,
+    "coverage": 0.5633827840454828,
+    "mae_ms": 2480.0,
+    "medae_ms": 55.0,
+    "pco_100": 0.3907,
+    "pco_200": 0.4578,
+    "pco_300": 0.4764
+  },
+  "buried": {
+    "n_words": 3181,
+    "coverage": 0.48255265639735934,
+    "mae_ms": 1846.8,
+    "medae_ms": 72.0,
+    "pco_100": 0.2814,
+    "pco_200": 0.3301,
+    "pco_300": 0.3471
+  },
+  "rap": {
+    "n_words": 4921,
+    "coverage": 0.5793537898801057,
+    "mae_ms": 2171.2,
+    "medae_ms": 42.0,
+    "pco_100": 0.4444,
+    "pco_200": 0.48,
+    "pco_300": 0.4845
+  },
+  "melisma": {
+    "n_words": 1270,
+    "coverage": 0.6062992125984252,
+    "mae_ms": 1636.7,
+    "medae_ms": 73.5,
+    "pco_100": 0.385,
+    "pco_200": 0.4756,
+    "pco_300": 0.4969
+  },
+  "held": {
+    "n_words": 951,
+    "coverage": 0.6803364879074658,
+    "mae_ms": 854.8,
+    "medae_ms": 57.0,
+    "pco_100": 0.4374,
+    "pco_200": 0.5384,
+    "pco_300": 0.572
+  },
+  "all": {
+    "n_words": 21580,
+    "coverage": 0.5627896200185357,
+    "mae_ms": 2187.4,
+    "medae_ms": 54.0,
+    "pco_100": 0.3886,
+    "pco_200": 0.4487,
+    "pco_300": 0.4646
+  }
+}