Stream Music

POST 
https://api.knoxstudio.ai/v1/music/stream

Same JSON body as POST /v1/music, but the audio is streamed. sign_with_c2pa is not used on the stream path. Billed at $0.20 per generated minute.

Request

Query Parameters

Name	Type	Required	Description
output_format	String	No	Default auto. Allowed: auto, mp3_48000_128, mp3_48000_192, mp3_48000_240, mp3_48000_320, mp3_22050_32, mp3_24000_48, mp3_44100_32, mp3_44100_64, mp3_44100_96, mp3_44100_128, mp3_44100_192, pcm_8000, pcm_16000, pcm_22050, pcm_24000, pcm_32000, pcm_44100, pcm_48000, ulaw_8000, alaw_8000, opus_48000_32, opus_48000_64, opus_48000_96, opus_48000_128, opus_48000_192.

Request Headers

Name	Type	Required	Description
Authorization	String	Yes	Bearer <token> Knox API key. xi-api-key is also accepted.
Content-Type	String	Yes	application/json.

Request Body

Same fields as Compose music, except sign_with_c2pa.

cURL Example

curl -N -X POST "https://api.knoxstudio.ai/v1/music/stream?output_format=mp3_44100_128" \
     -H "Authorization: Bearer $KNOXCHAT_API_KEY" \
     -H "Content-Type: application/json" \
     -o song.mp3 \
     -d '{
  "model_id": "music_v2_5",
  "prompt": "A calm lo-fi beat with rain and soft piano",
  "music_length_ms": 45000
}'

Response

Success Response (200)

Streaming audio bytes. Content-Type follows output_format.

Error Responses

Validation uses HTTP 422:

{
  "detail": [
    {
      "loc": ["body", "field"],
      "msg": "…",
      "type": "value_error"
    }
  ]
}

Other errors use { "detail": "message" }.

Status	When
400	WebSocket path called without Upgrade: websocket.
401	Missing or invalid API key.
402	Insufficient credits.
403	Token is not allowed to use this model.
404	Resource not found.
422	Validation error.
429	Rate limit exceeded.
500	Internal server error.