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Image

gpt-image-2gpt-image-2-officialgemini-2.5-flash-image-previewgemini-3-pro-image-previewgemini-3.1-flash-image-previewdoubao-seedream-5-0-liteimagen-4-0

Audio

Vocal Remover APIMusic Extractor APIVoice Cleaner APIMultistem Splitter APIVoice Changer API

Video

doubao-seedance-2.0seedance-2.0-betaseedance-2.0-fast-betahappyhorse-1.0happyhorse-1.0-officialviduq3grok-imagine-1.0-videoVeo 3.1gemini-omni

Tools

enhance-video-1.0
X (Twitter)

Multistem Splitter API

Extract multiple stems from one source audio file in a single async audio task.

Multistem Splitter API

Use audio-multistem to extract up to six supported stems from one public audio URL.

Endpoint

POST /api/v1/audio/generations

Poll completion with:

GET /api/v1/tasks/{id}

Example

curl https://reapi.ai/api/v1/audio/generations \
  -H "Authorization: Bearer $REAPI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "audio-multistem",
    "audio_url": "https://cdn.example.com/song.wav",
    "stem_list": ["vocals", "drum", "bass"],
    "encoder_format": "mp3"
  }'

Parameters

FieldTypeRequiredNotes
modelstringyesUse audio-multistem.
audio_urlURLyesPublic HTTP(S) source audio URL.
stem_listenum[]yes1-6 values: vocals, drum, piano, bass, electric_guitar, acoustic_guitar.
splitterenumnoauto, andromeda, perseus, orion, phoenix, lyra, or lynx. auto is omitted upstream so the default engine is used.
extraction_levelenumnodeep_extraction or clear_cut. Defaults to deep_extraction.
dereverb_enabledbooleannoEnable dereverb cleanup.
encoder_formatenumnomp3, wav, flac, aac, or ogg.

Output

Completed tasks return output.audio_urls and, when available, labeled output.tracks.

Multistem jobs are billed at 200 credits ($0.20) per rounded-up source minute multiplied by selected stem count.

Table of Contents

Multistem Splitter API
Endpoint
Example
Parameters
Output