POST
/
audio_to_midi
Python
import requests

url = "https://api.musicgpt.com/api/public/v1/audio_to_midi"
headers = {"Authorization": "<<<api key>>>"}

# Option 1: Use audio URL
payload = {
    "audio_url": "https://example.com/audio_file.wav",
    "sonify_midi": True,
    "save_note_events": True,
    "webhook_url": "https://your-webhook-url.com/callback"
}
response = requests.post(url, headers=headers, data=payload)
print(response.json())

# Option 2: Upload local audio file
payload = {
    "sonify_midi": True,
    "save_note_events": True,
    "webhook_url": "https://your-webhook-url.com/callback"
}
with open("audio.wav", "rb") as f:
    files = {"audio_file": f}
    response = requests.post(url, headers=headers, data=payload, files=files)
print(response.json())
{
  "success": true,
  "task_id": "task789",
  "message": "MIDI conversion task queued successfully"
}
Convert an audio file into a MIDI file using AI-driven audio analysis and transcription. The Audio to MIDI endpoint processes audio files to generate MIDI sequences. It can optionally create a sonified .wav file of the MIDI output and export note events into a .csv file for further analysis or editing. Ideal for music production, remixing, and advanced audio content creation.

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Endpoint

POST /audio_to_midi
This is the primary endpoint for initiating audio-to-MIDI conversion tasks.

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Sample Output

Generated MIDI and optional outputs from a sample audio file: Download MIDI(.mid) Download Sonified MIDI(.wav)

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Try it Yourself

Visit the Audio to MIDI Endpoint Explorer to test it live. Upload an audio file, and get back the MIDI version!

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🛠️ Request Parameters

ParameterTypeRequiredDefaultDescription
audio_pathString✅ Yes-The S3 path of the input audio file to convert.
sonify_midiBooleanOptionaltrueIf true, generates a .wav file that plays the MIDI output.
save_note_eventsBooleanOptionaltrueIf true, saves predicted note events as a .csv file.
webhook_urlStringOptional""Callback URL for asynchronous result delivery.
💡 Note: audio_path must be a valid and accessible S3 URL.

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Sample Request

​
cURL

curl -X POST "https://api.musicgpt.com/api/public/v1/audio_to_midi" \
-H "accept: application/json" \
-H "Authorization: <api_key>" \
-d '{
  "audio_path": "s3://your-bucket/input_audio.wav",
  "sonify_midi": true,
  "save_note_events": true,
  "webhook_url": "https://yourdomain.com/webhook"
}'

​
Python

import requests

url = "https://api.musicgpt.com/api/public/v1/audio_to_midi"
headers = {"Authorization": "<<<api key>>>"}

# Option 1: Use audio URL
payload = {
    "audio_url": "https://example.com/audio_file.wav",
    "sonify_midi": True,
    "save_note_events": True,
    "webhook_url": "https://your-webhook-url.com/callback"
}
response = requests.post(url, headers=headers, data=payload)
print(response.json())

# Option 2: Upload local audio file
payload = {
    "sonify_midi": True,
    "save_note_events": True,
    "webhook_url": "https://your-webhook-url.com/callback"
}
with open("audio.wav", "rb") as f:
    files = {"audio_file": f}
    response = requests.post(url, headers=headers, data=payload, files=files)
print(response.json())
🔐 Replace api_key, audio_path, and webhook_url with your own values before sending.

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Sample Response

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Success (200 OK)

{
  "success": true,
  "task_id": "abcdef1234567890",
  "status": "processing"
}

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Common Errors

  • 400 Bad Request: Invalid audio_path or missing required parameters.
  • 404 Not Found: Provided audio file not found in S3.
  • 422 Unprocessable Entity: Unsupported audio format.
  • 500 Internal Server Error: An unexpected error occurred while processing.

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Webhook Response

When the conversion process completes, if a webhook_url was provided, the system sends a POST request: 
{
  "success": true, 
  "conversion_type": "Audio to MIDI", 
  "task_id": "f5b563e5-e414-47ec-989b-255c74d90119", 
  "conversion_id": "c7127f6b-e9a4-4d22-8804-d94a8521155a", 
  "midi_file_path": "https://lalals.s3.amazonaws.com/AudioToMidi/f5b563e5-e414-47ec-989b-255c74d90119.mid", 
  "sonify_file_path": "https://lalals.s3.amazonaws.com/AudioToMidi/f5b563e5-e414-47ec-989b-255c74d90119.wav", 
  "notes_file_path": "", 
  "message": "Audio to Midi Completed"
}
You can download your generated files using the provided URLs.

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Payload and Request Formation

Authorizations

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Authorization
string
header
required

Body

multipart/form-data
​
audio_url
string
required

URL of the audio file to convert to MIDI.

Example:

"https://example.com/audio.mp3"

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audio_path
string

Deprecated: Use audio_url instead.

Example:

"https://example.com/audio.mp3"

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audio_file
file

Audio file to upload and process directly.

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sonify_midi
boolean
default:true

If true, generates a .wav file that sonifies the MIDI output.

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save_note_events
boolean
default:true

If true, saves predicted note events as a CSV file.

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webhook_url
string

Callback URL to receive conversion results.

Example:

"https://your-webhook-url.com/callback"

Response

MIDI conversion task initiated successfully

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success
boolean
Example:

true

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task_id
string
Example:

"task789"

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message
string
Example:

"MIDI conversion task queued successfully"