add_notes
Insert MIDI notes into existing MIDI items in REAPER DAW tracks by specifying pitch, timing, duration, and velocity parameters.
Instructions
Add MIDI notes to an existing MIDI item.
Args:
track_number: Track number (1-based)
item_index: Index of the MIDI item (0-based)
notes: List of note dictionaries with:
- pitch: MIDI note number (0-127, middle C = 60)
- start: Start position in beats (relative to item)
- duration: Duration in beats
- velocity: Velocity (1-127, default 100)Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| track_number | Yes | ||
| item_index | Yes | ||
| notes | Yes |
Output Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| result | Yes |
Implementation Reference
- scythe_mcp/server/main.py:249-270 (handler)The primary MCP tool handler for 'add_notes', decorated with @mcp.tool() which registers the tool and defines its input schema via type annotations and docstring. It calls ReaperBridge.add_notes to perform the action.
@mcp.tool() def add_notes( ctx: Context, track_number: int, item_index: int, notes: List[Dict[str, Any]] ) -> str: """ Add MIDI notes to an existing MIDI item. Args: track_number: Track number (1-based) item_index: Index of the MIDI item (0-based) notes: List of note dictionaries with: - pitch: MIDI note number (0-127, middle C = 60) - start: Start position in beats (relative to item) - duration: Duration in beats - velocity: Velocity (1-127, default 100) """ bridge = get_bridge() result = bridge.add_notes(track_number - 1, item_index, notes) return result.get("message", f"Added {len(notes)} note(s)") - Helper method in the ReaperBridge class that serializes the add_notes parameters and sends them as a command to the REAPER bridge protocol.
def add_notes(self, track_index: int, item_index: int, notes: List[Dict]) -> Dict[str, Any]: """Add MIDI notes via file command.""" self._write_command("add_notes", { "track_index": track_index, "item_index": item_index, "notes": notes }) response = self._read_response() if response: return response return {"success": True, "message": "Notes command sent"}