Media
Design and render musical fade-ins and fade-outs: bar-based lengths at your BPM or lengths auto-derived from detected silence, fades placed against the real music span, logarithmic curves, optional silence trimming.
Call this tool from your code in three languages.
# 1) Request a presigned URL → returns { uploadUrl, storageKey }
curl -X POST 'http://127.0.0.1:3003/api/upload/presign/audio-automatic-fade-designer' \
-H 'Content-Type: application/json' \
-d '{"filename":"audioFile.ext","contentType":"application/octet-stream","size":12345}'
# 2) PUT the file bytes directly to the presigned uploadUrl
curl -X PUT '<presigned uploadUrl>' \
--data-binary @/path/to/file.ext
# 3) Call the tool, passing the returned storageKey for each file field
curl -X POST 'http://127.0.0.1:3003/en/api/tools/audio-automatic-fade-designer' \
-F 'audioFile=uploads/2026/01/01/your-tool-1700000000000-abc123.ext' \
-F 'lengthEngine=tempo' \
-F 'bpm=120' \
-F 'fadeInUnit=1' \
-F 'fadeOutUnit=2' \
-F 'fadeCurve=log' \
-F 'trimSilence=true' \
-F 'outputFormat=wav'Send a POST request with your inputs as JSON. File parameters require a separate upload first.
POST http://127.0.0.1:3003/en/api/tools/audio-automatic-fade-designer| Name | Type | Required | Description |
|---|---|---|---|
| audioFile | fileupload required | Yes | — |
| lengthEngine | select | Yes | — |
| bpm | number | No | — |
| fadeInUnit | select | Yes | — |
| fadeOutUnit | select | Yes | — |
| fadeCurve | select | Yes | — |
| trimSilence | checkbox | No | — |
| outputFormat | select | No | — |
File result
{
"filePath": "/public/processing/randomid.ext",
"fileName": "output.ext",
"contentType": "application/octet-stream",
"size": 1024,
"metadata": {
"key": "value"
},
"error": "Error message (optional)",
"message": "Notification message (optional)"
}Add this tool to your Model Context Protocol server so AI agents can list and call it.
Add this block to your MCP client configuration:
{
"mcpServers": {
"elysiatools-audio-automatic-fade-designer": {
"name": "audio-automatic-fade-designer",
"description": "Design and render musical fade-ins and fade-outs: bar-based lengths at your BPM or lengths auto-derived from detected silence, fades placed against the real music span, logarithmic curves, optional silence trimming.",
"baseUrl": "http://127.0.0.1:3003/mcp/sse?toolId=audio-automatic-fade-designer",
"command": "",
"args": [],
"env": {},
"isActive": true,
"type": "sse"
}
}
}After connecting to the SSE endpoint, list the exposed tools:
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/list"
}Invoke the tool by its id, passing arguments built from its parameters:
{
"jsonrpc": "2.0",
"id": 2,
"method": "tools/call",
"params": {
"name": "audio-automatic-fade-designer",
"arguments": {
"audioFile": "https://example.com/file.ext",
"lengthEngine": "tempo",
"bpm": 120,
"fadeInUnit": "1",
"fadeOutUnit": "2",
"fadeCurve": "log",
"trimSilence": true,
"outputFormat": "wav"
}
}
}Questions or issues? Contact [email protected]