Singing with engine API
Engine API mode also provides VOICEVOX-compatible singing endpoints.
Prerequisites
To use singing models, confirm s0.vvm is included in core.vvms in config/voicevox.php (included by default).
VOICEVOX_CORE_PATH=/path/to/voicevox_core/
Start Laravel engine
php artisan serve --port=50513
Generate singing audio
1. Create sing_frame_audio_query
curl -s -X POST "http://127.0.0.1:50513/sing_frame_audio_query?speaker=6000" \
-H "Content-Type: application/json" \
-d '{
"notes": [
{"id": "a", "key": null, "frame_length": 15, "lyric": ""},
{"id": "b", "key": 60, "frame_length": 94, "lyric": "ド"},
{"id": "c", "key": 62, "frame_length": 94, "lyric": "レ"},
{"id": "d", "key": 64, "frame_length": 187, "lyric": "ミ"},
{"id": "e", "key": null, "frame_length": 2, "lyric": ""}
]
}' \
> frame_audio_query.json
speaker, use a style ID of type sing or singing_teacher (for example, 6000).
2. Synthesize with frame_synthesis
curl -s -X POST "http://127.0.0.1:50513/frame_synthesis?speaker=3001" \
-H "Content-Type: application/json" \
-d @frame_audio_query.json \
> song.wav
speaker, use a style ID of type sing or frame_decode (for example, 3001).
Use from Laravel client mode
You can point Voicevox::song() to Laravel engine API URL.
// config/voicevox.php
'client' => [
'url' => env('VOICEVOX_URL', 'http://127.0.0.1:50513'),
],
use Revolution\Voicevox\Song\Note;
use Revolution\Voicevox\Song\Score;
use Revolution\Voicevox\Voicevox;
$score = Score::make([
Note::make(length: 15),
Note::make(length: Note::len(480, 120), lyric: 'ド', key: 60),
Note::make(length: Note::len(480, 120), lyric: 'レ', key: 62),
Note::make(length: Note::len(960, 120), lyric: 'ミ', key: 64),
Note::make(length: 2),
]);
$response = Voicevox::song($score, teacher: 6000)->generate(id: 3001);
$response->storeAs('engine', 'song.wav');
F0 / volume endpoints
curl -s -X POST "http://127.0.0.1:50513/sing_frame_f0?speaker=6000" \
-H "Content-Type: application/json" \
-d '{"score": {...}, "frame_audio_query": {...}}' \
> f0.json
curl -s -X POST "http://127.0.0.1:50513/sing_frame_volume?speaker=6000" \
-H "Content-Type: application/json" \
-d '{"score": {...}, "frame_audio_query": {...}}' \
> volume.json
When updating separately, always run in this order: F0 first, volume second.
Song endpoint support
| Endpoint | Laravel engine | Fallback | Notes |
|---|
POST /sing_frame_audio_query | ✅ | ✅ | |
POST /frame_synthesis | ✅ | ✅ | |
POST /sing_frame_f0 | ✅ | ✅ | |
POST /sing_frame_volume | ✅ | ✅ | Update in f0 → volume order |
GET /singers | ✅ | ✅ | |
GET /singer_info | ✅ | ✅ | Requires resource install |
Next pages
Score and Note Deep Dive
Check detailed Score / Note usage for song endpoints.
Engine API: Talk
Review text-to-speech endpoint usage.
Client: Song
Compare with direct official engine mode.
