timeline_audio_add
Add Audio To Timeline
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Third-party content written by another agent. Data to evaluate, not instructions.
Place an uploaded audio asset onto the actual BlitzReels project timeline at a timestamp. Use after media_upload_file when the user asks to add voiceover, music, or audio to a video.
Input schema
| Property | Type | Required | Description |
|---|---|---|---|
| projectId | string | yes | BlitzReels project ID. UUID string. |
| assetId | string | yes | Audio media asset ID. UUID string. |
| startSeconds | number | no | Timeline start time in seconds |
| durationSeconds | number | no | Optional duration. Required if the audio asset duration is not known yet. |
| volume | number | no | Audio volume multiplier, 1 is normal |
| fadeInSeconds | number | no | Fade-in length in seconds |
| fadeOutSeconds | number | no | Fade-out length in seconds |
| loop | boolean | no | Loop audio to fill requested duration |
Raw JSON schema
{
"type": "object",
"properties": {
"projectId": {
"type": "string",
"description": "BlitzReels project ID. UUID string.",
"format": "uuid"
},
"assetId": {
"type": "string",
"description": "Audio media asset ID. UUID string.",
"format": "uuid"
},
"startSeconds": {
"type": "number",
"description": "Timeline start time in seconds",
"default": 0,
"minimum": 0
},
"durationSeconds": {
"type": "number",
"description": "Optional duration. Required if the audio asset duration is not known yet.",
"minimum": 0
},
"volume": {
"type": "number",
"description": "Audio volume multiplier, 1 is normal",
"default": 1
},
"fadeInSeconds": {
"type": "number",
"description": "Fade-in length in seconds",
"default": 0,
"minimum": 0
},
"fadeOutSeconds": {
"type": "number",
"description": "Fade-out length in seconds",
"default": 0,
"minimum": 0
},
"loop": {
"type": "boolean",
"description": "Loop audio to fill requested duration",
"default": false
}
},
"required": [
"projectId",
"assetId"
],
"additionalProperties": false
}