---
title: "Extract Key, BPM, and Key Changes from Audio"
method: POST
path: "/v1/extract_key_bpm"
---

# Extract Key, BPM, and Key Changes from Audio

`POST /v1/extract_key_bpm`

Processes an audio file to extract key changes, dominant key, and BPM (Beats Per Minute).

## Response `200`

Successfully initiated key/bpm extraction

- object
  - `success` boolean
  - `task_id` string
  - `conversion_id` string
  - `eta` integer
  - `credit_estimate` number, float
  - `message` string

## Other responses

- `422` — Validation Error
- `500` — Server Error

---

[API](https://skmtc.net/musicgpt/apis/musicgpt-api.md) · [All operations](https://skmtc.net/musicgpt/apis/musicgpt-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/musicgpt/musicgpt-api/revisions/6753dccf4c5d/schema)