# ableton-mcp

A full-featured [Model Context Protocol (MCP)](https://modelcontextprotocol.io/) server that gives AI assistants (Claude, etc.) complete control over Ableton Live via [AbletonOSC](https://github.com/ideoforms/AbletonOSC).

## Overview

**ableton-mcp** bridges AI assistants and Ableton Live by exposing **160+ MCP tools** covering the full AbletonOSC API: transport, mixing, clips, MIDI notes, devices, scenes, return tracks, browser, groove pool, view navigation, and real-time listeners.

The server communicates with Ableton Live via AbletonOSC — a MIDI Remote Script that runs inside Live and exposes its internal API over OSC/UDP.

```
Claude (AI) ──MCP tools──▶ ableton-mcp ──OSC/UDP──▶ AbletonOSC ──Live Object Model──▶ Ableton Live
```

---

## Requirements

- **Ableton Live 11 or later**
- **Python 3.10+**
- **AbletonOSC** installed as a MIDI Remote Script

---

## Installation

### 1. Install AbletonOSC in Ableton Live

1. Copy the `AbletonOSC` folder into your Ableton User Library Remote Scripts directory:
   - **Windows:** `%USERPROFILE%\Documents\Ableton\User Library\Remote Scripts`
   - **macOS:** `~/Music/Ableton/User Library/Remote Scripts`
2. Restart Ableton Live
3. Open **Preferences → Link, Tempo & MIDI → MIDI** and set one of the Control Surface slots to **AbletonOSC**

AbletonOSC listens on **UDP port 11000** and replies on **port 11001**.

### 2. Install ableton-mcp

```bash
git clone https://github.com/your-user/ableton-mcp
cd ableton-mcp

python -m venv .venv
.venv\Scripts\activate          # Windows
# source .venv/bin/activate     # macOS/Linux

pip install -e .
```

### 3. Configure Claude Code

Add to `~/.claude/settings.json`:

```json
{
  "mcpServers": {
    "ableton-mcp": {
      "command": "C:\\path\\to\\ableton-mcp\\.venv\\Scripts\\ableton-mcp.exe",
      "args": []
    }
  }
}
```

Restart Claude Code. Tools appear automatically when a Live session is open.

---

## Configuration

| Variable | Default | Description |
|---|---|---|
| `ABLETON_HOST` | `127.0.0.1` | AbletonOSC host address |
| `ABLETON_SEND_PORT` | `11000` | Port to send OSC to Live |
| `ABLETON_RECEIVE_PORT` | `11001` | Port to receive OSC from Live |
| `ABLETON_TIMEOUT` | `5.0` | Query timeout in seconds |

---

## Tool Reference

### System (5 tools)

| Tool | Description |
|---|---|
| `system_test_connection` | Ping AbletonOSC; returns `{connected, latency_ms}` |
| `system_get_version` | Get Ableton Live version `{major, minor}` |
| `system_get_cpu_usage` | Average CPU process usage (0.0–1.0) |
| `system_show_message` | Display a message in the Ableton status bar |
| `system_reload_api` | Hot-reload all AbletonOSC modules |

---

### Song / Transport (38 tools)

#### Playback
| Tool | Description |
|---|---|
| `song_get_state` | Full snapshot: tempo, is_playing, loop, time sig, track/scene/return counts, groove |
| `song_start_playing` | Start playback from current position |
| `song_stop_playing` | Stop playback |
| `song_continue_playing` | Resume without resetting to start |
| `song_stop_all_clips` | Stop all active clips |
| `song_tap_tempo` | Send a tap-tempo pulse |

#### Tempo & Time
| Tool | Description |
|---|---|
| `song_get_tempo` / `song_set_tempo` | Get/set BPM (20–300) |
| `song_get_time` / `song_set_time` | Get/jump playhead position in beats |
| `song_jump_by` | Move playhead by ±N beats relative to current position |
| `song_jump_to_next_cue` | Jump to next cue point |
| `song_jump_to_prev_cue` | Jump to previous cue point |
| `song_get_time_signature` / `song_set_time_signature` | Get/set numerator + denominator |

#### Loop
| Tool | Description |
|---|---|
| `song_get_loop` | Get `{loop, loop_start, loop_length}` |
| `song_set_loop` | Set on/off, start, and length (beats) |

#### Metronome, Quantization & Groove
| Tool | Description |
|---|---|
| `song_get_metronome` / `song_set_metronome` | Toggle metronome |
| `song_set_quantization` | Clip trigger quantization (0=none … 13=1/32) |
| `song_set_midi_recording_quantization` | MIDI recording quantization |
| `song_set_groove` | Global groove amount (0.0–1.0) |

#### Recording
| Tool | Description |
|---|---|
| `song_set_arrangement_overdub` | Enable/disable arrangement overdub |
| `song_set_session_record` | Enable/disable session record |
| `song_set_punch_in` / `song_set_punch_out` | Punch in/out |
| `song_trigger_session_record` | Toggle session record |
| `song_capture_midi` | Capture incoming MIDI into a new clip |
| `song_re_enable_automation` | Re-enable overridden automation |

#### Edit
| Tool | Description |
|---|---|
| `song_undo` / `song_redo` | Undo/redo |

#### Tracks & Scenes
| Tool | Description |
|---|---|
| `song_get_tracks` | List all tracks with index and name |
| `song_get_return_tracks` | List all return tracks with index and name |
| `song_create_audio_track` / `song_create_midi_track` / `song_create_return_track` | Create tracks |
| `song_delete_track` / `song_delete_return_track` / `song_duplicate_track` | Delete/duplicate tracks |
| `song_get_scenes` | List all scenes with index and name |
| `song_create_scene` / `song_delete_scene` / `song_duplicate_scene` | Scene CRUD |

#### Cue Points
| Tool | Description |
|---|---|
| `song_get_cue_points` | List all cue points `{index, name, time}` |

---

### Tracks (19 tools)

| Tool | Description |
|---|---|
| `track_get_info` | All properties: name, volume, pan, mute, solo, arm, type, color, monitoring, slots, device count |
| `track_set_volume` | Volume (0.0=−∞, 0.85≈0 dB, 1.0=+6 dB) |
| `track_set_pan` | Panning (−1.0=left, 0.0=center, +1.0=right) |
| `track_set_mute` / `track_set_solo` / `track_set_arm` | Mute/solo/arm |
| `track_get_send` / `track_set_send` | Get/set send level to a return track |
| `track_set_name` | Rename a track |
| `track_set_color` | Set track color by palette index (0–69) |
| `track_stop_clips` | Stop all clips on a track |
| `track_set_monitoring` | Monitoring: 0=Auto, 1=In, 2=Off |
| `track_set_fold` | Fold/unfold a group track |
| `track_get_clips` | Session clips: index, name, length, color, is_playing |
| `track_get_arrangement_clips` | Arrangement clips: index, name, length, start_time |
| `track_get_devices` | Devices: index, name, type, class_name, can_have_chains |
| `track_get_meter` | Output meter: level, left, right, peak_left, peak_right |
| `track_delete_device` / `track_duplicate_device` | Remove/duplicate device |
| `track_get_input_routing` | Current input type + channel + available options |
| `track_set_input_routing_type` / `track_set_input_routing_channel` | Set input routing |
| `track_get_output_routing` | Current output type + channel + available options |
| `track_set_output_routing_type` / `track_set_output_routing_channel` | Set output routing |

---

### Return Tracks (11 tools)

| Tool | Description |
|---|---|
| `return_track_get_info` | All properties: name, mute, solo, color, volume, panning |
| `return_track_set_volume` / `return_track_set_panning` | Volume/pan |
| `return_track_set_mute` / `return_track_set_solo` | Mute/solo |
| `return_track_set_name` / `return_track_set_color` | Rename/recolor |
| `return_track_get_send` / `return_track_set_send` | Inter-return sends |
| `return_track_get_meter` | Output meter: level, left, right |
| `return_track_get_devices` | List devices on the return track |

---

### Clips (31 tools)

#### Playback & Properties
| Tool | Description |
|---|---|
| `clip_fire` / `clip_stop` | Launch/stop a clip |
| `clip_get_info` | All properties: name, length, playing state, loop, markers, pitch, gain, launch mode |
| `clip_set_name` / `clip_set_color` | Rename/recolor |
| `clip_set_gain` | Clip gain in dB |
| `clip_set_muted` | Mute/unmute |
| `clip_set_looping` / `clip_set_loop_points` | Enable loop and set start/end |
| `clip_set_markers` | Set clip start/end markers |
| `clip_set_pitch` | Transpose: semitones (−48…+48) and cents (−50…+50) |
| `clip_set_warp_mode` | Warp mode: 0=Beats, 1=Tones, 2=Texture, 3=Re-Pitch, 4=Complex, 5=Complex Pro |
| `clip_set_warping` | Enable/disable warping |
| `clip_set_launch_mode` | 0=Trigger, 1=Gate, 2=Toggle, 3=Repeat |
| `clip_set_launch_quantization` | Per-clip quantization (0–14) |
| `clip_set_legato` | Enable/disable legato |
| `clip_set_velocity_amount` | Scale note velocities (0.0–1.0) |
| `clip_set_ram_mode` | Enable/disable RAM mode for audio clips |
| `clip_duplicate_loop` | Double loop by duplicating content |
| `clip_quantize` | Quantize MIDI notes (quantization enum + strength 0.0–1.0) |

#### MIDI Notes
| Tool | Description |
|---|---|
| `clip_get_notes` | Notes filtered by pitch/time range: `{pitch, start, duration, velocity, mute}` |
| `clip_get_notes_extended` | Extended notes with note_id, release_velocity, probability |
| `clip_add_notes` | Add notes: `[{pitch, start, duration, velocity, mute}, …]` |
| `clip_apply_note_modifications` | Modify existing notes by note_id |
| `clip_remove_notes` | Remove notes in pitch/time range |

#### Automation Envelopes
| Tool | Description |
|---|---|
| `clip_get_automation_envelope` | Get breakpoints `{time, value}` for a device param |
| `clip_create_automation_envelope` | Create envelope for a device param |
| `clip_clear_envelope` | Clear one param's envelope |
| `clip_clear_all_envelopes` | Clear all envelopes in a clip |

#### Warp & Groove
| Tool | Description |
|---|---|
| `clip_get_warp_markers` | Warp markers: `{beat_time, sample_time}` |
| `clip_get_groove` / `clip_set_groove` | Get/assign groove by name |

---

### Clip Slots (7 tools)

| Tool | Description |
|---|---|
| `clip_slot_get_info` | State: has_clip, is_playing, is_triggered, will_record, is_group_slot |
| `clip_slot_fire` / `clip_slot_stop` | Trigger/stop a slot |
| `clip_slot_create_clip` | Create empty MIDI clip with given length in beats |
| `clip_slot_delete_clip` | Delete the clip in a slot |
| `clip_slot_duplicate_to` | Copy clip to another slot |
| `clip_slot_set_stop_button` | Enable/disable slot stop button |

---

### Scenes (9 tools)

| Tool | Description |
|---|---|
| `scene_fire` | Launch a scene by index |
| `scene_fire_as_selected` | Fire scene respecting follow actions |
| `scene_get_info` | All properties: name, color, tempo, time sig, is_empty, is_triggered |
| `scene_get_num_clips` | Number of clips in the scene |
| `scene_get_clip_slots` | Per-slot occupancy: `{slot_index, has_clip}` |
| `scene_set_name` / `scene_set_color` | Rename/recolor |
| `scene_set_tempo` | Override tempo (with enable toggle) |
| `scene_set_time_signature` | Override time signature |

---

### Devices (15 tools)

| Tool | Description |
|---|---|
| `device_get_info` | Name, type, class_name, num_parameters, is_active |
| `device_get_is_active` / `device_set_is_active` | Get/set bypass state |
| `device_get_parameters` | All params: index, name, value, min, max, default_value, is_quantized |
| `device_get_parameter` | Single param: name, value, min, max, default_value, value_string |
| `device_set_parameter` | Set a parameter value (0.0–1.0 normalized) |
| `device_set_parameters_bulk` | Set multiple params: `[{index, value}, …]` |
| `device_randomize_macros` | Randomize rack macro knobs |
| `device_get_chains` | Rack chains: index, name, num_devices, device names |
| `device_get_drum_pads` | Drum Rack pads: index, name, note, mute, solo |
| `device_set_drum_pad_mute` / `device_set_drum_pad_solo` | Mute/solo a drum pad |
| `device_chain_get_parameter` | Get a param value inside a rack chain |
| `device_chain_set_parameter` | Set a param value inside a rack chain |

---

### View / Navigation (8 tools)

| Tool | Description |
|---|---|
| `view_get_selection` | Selected track, scene, clip, and device |
| `view_get_focused_document_view` | Active view name (e.g. `'Session'`, `'Arranger'`) |
| `view_set_selected_track` | Select a track |
| `view_set_selected_scene` | Select a scene |
| `view_set_selected_clip` | Select a clip |
| `view_show_clip_detail` | Show clip detail panel |
| `view_show_device_detail` | Show device detail panel |
| `view_focus_browser` | Focus the browser panel |

---

### Browser (6 tools)

| Tool | Description |
|---|---|
| `browser_get_items` | List items in a category: `audio_effects` / `instruments` / `midi_effects` / `samples` / `sounds` / `clips` / `packs` / `plugins` |
| `browser_load_item` | Load an item into the selected track/slot (pass path parts as args) |
| `browser_preview_item` | Preview a sample or preset |
| `browser_stop_preview` | Stop browser preview playback |
| `browser_get_hotswap_target` | Name of device targeted for hotswap |
| `browser_begin_hotswap` | Begin hotswap mode for a device |

---

### Groove Pool (3 tools)

| Tool | Description |
|---|---|
| `groove_get_all` | List all groove names in the groove pool |
| `groove_get_amount` | Get groove intensity (0.0–1.0) by name |
| `groove_set_amount` | Set groove intensity (0.0–1.0) by name |

---

### Real-time Listeners (3 tools)

Subscribe to property changes from Ableton Live and poll them at any time.

| Tool | Description |
|---|---|
| `listener_start` | Register a listener for a property |
| `listener_stop` | Unregister a listener |
| `listener_get_events` | Drain queued events (up to `max_events`); each event is a list of OSC args |

**Supported objects and properties:**

| object_type | property_name | Notes |
|---|---|---|
| `song` | `beat` | `[beat_number, beat_index, bar, song_time]` per beat |
| `song` | `is_playing` | `[0/1]` |
| `song` | `tempo` | `[bpm]` |
| `song` | `current_song_time` | `[beats]` |
| `view` | `selected_track` | `[track_index]` |
| `view` | `selected_scene` | `[scene_index]` |
| `track` | any read/write property | requires `track_index` |
| `clip` | any read/write property | requires `track_index` + `clip_index` |
| `clip_slot` | any property | requires `track_index` + `clip_index` |

---

## Example Prompts

```
Play the song from bar 3 at 128 BPM with the metronome on.

Create a 4-bar MIDI clip on track 0, slot 1, and add a C minor chord
(C3, Eb3, G3) on beats 1 and 3 with velocity 90.

Load a reverb from the browser onto the first return track and set the
wet/dry to 50%.

Get all drum pad names on track 0's Drum Rack, then mute every pad
that isn't a kick or snare.

Solo track 3, set its reverb send to 0.4, and watch the output meter
until it clips.

Set the groove pool's first groove to 80% intensity and assign it to
all clips on track 1.
```

---

## Architecture

```
src/ableton_mcp/
├── server.py         # FastMCP app; registers all tool modules
├── osc_client.py     # Thread-safe OSCClient singleton
│                     #   cmd()   – fire-and-forget
│                     #   query() – synchronous request/response
│                     #   start_listener() / drain_listener() – real-time events
├── config.py         # Port/host/timeout from env vars
└── tools/
    ├── song.py        # Transport, tempo, loop, scenes, tracks, cues
    ├── track.py       # Mixing, routing, devices list, meter
    ├── clip.py        # Playback, MIDI notes, pitch, warp, loop, launch, envelopes
    ├── clip_slot.py   # Slot-level create/fire/delete/duplicate
    ├── scene.py       # Scene fire, info, clip slots, tempo/time-sig overrides
    ├── device.py      # Parameters (individual + bulk), chains, drum pads
    ├── return_track.py# Return/aux track mixing and devices
    ├── browser.py     # Content library browsing, load, preview, hotswap
    ├── groove.py      # Groove pool listing and amount control
    ├── view.py        # Selected track/scene/clip, panel navigation
    ├── system.py      # Connectivity, version, CPU, status bar
    └── listener.py    # Real-time property change subscriptions
```

---

## Troubleshooting

**`system_test_connection` returns `connected: false`**
- Confirm AbletonOSC is enabled in Preferences → Control Surfaces
- A Live project must be open (AbletonOSC only activates with an open set)
- Check that no firewall blocks UDP 11000/11001 on localhost

**Timeout errors**
- Increase `ABLETON_TIMEOUT` env var (default 5 s)
- `song_get_state` issues many sequential queries; slow machines may need 10 s+

**`No module named 'ableton_mcp'`**
- Install with `pip install -e .` inside the correct `.venv`
- The MCP config `command` path must point to the `.venv` executable

---

## License

MIT