Ableton Live MCP Server

Enable or disable Ableton Link, which syncs tempo and phase with other Link-enabled apps and devices on the local network.

Toggle arrangement overdub: recording layers MIDI onto existing arrangement clips instead of replacing them.

Move the arrangement playhead to a specific position. Parameters: - time: Position in beats from the start of the arrangement (e.g. 8.0 = bar 3 in 4/4)

Set a parameter on a device INSIDE a rack chain (indices from get_rack_chains). Values clamp to the parameter's native range.

Set audio-clip properties. gain 0-1, pitch_coarse semitones (-48..48), pitch_fine cents, warping on/off, warp_mode 0=Beats 1=Tones 2=Texture 3=Re-Pitch 4=Complex 6=Complex Pro.

Set an existing Session clip's palette color without changing its content. This is a visual organization change only. Use set_track_color to recolor the track header instead. Repeating the same color has no additional effect.

Attach a Groove Pool groove to a clip by index (swing/timing feel). Pass no groove_index to clear.

Update selected loop and launch markers on one existing Session clip. Provide at least one optional field; omitted fields stay unchanged. `start` and `end` are loop-brace positions in clip-relative beats and end must be after start. `start_marker` controls where non-looped launch begins; `looping` enables or disables repetition. Use set_loop for the Arrangement's global loop region, not a clip, and get_clip_info to inspect current values.

Rename an existing Session-view clip without changing its notes or audio. The slot must contain a clip. Use this for the clip label; use set_track_name for the track label. Repeating the same name has no additional effect.

Set a clip's own time signature (polymeter / odd-bar loops).

Global launch quantization for firing clips/scenes. 0=None (instant, good for auditioning), 4=1 bar (default), 7=1/4 note, 13=1/32.

Assign one regular track to crossfader side A, neither side, or side B. This configures which side affects the track; it does not move the crossfader or change track volume immediately. Use set_crossfader afterward to blend the A/B groups. Repeating the same assignment has no additional effect.

Set the master crossfader (-1.0 = full A, 0 = center, 1.0 = full B).

Enable or bypass one device on a regular track. `true` turns the device on; `false` bypasses its processing while preserving the device and parameter values. This changes audible signal flow but not clip content. Use set_track_mute to silence the whole track, or set_device_parameter to change one control.

Set a parameter after reading get_device_parameters. Numbers use the native range; strings use display units ('250 Hz', '-6 dB') or exact enum labels. Unsupported display mappings fail before writing. Returns Live's actual readback and warnings.

Set a device's sidechain audio input. `field` is "input_routing_type" (the source track/return) or "input_routing_channel" (Pre FX / Post FX / Post Mixer); `display_name` is one of the options from get_device_routing. For ducking, also enable the device's Sidechain parameter via set_device_parameter.

Mute/solo/rename a single Drum Rack pad by its MIDI note (e.g. 36=kick). Per-pad muting = instant beat variations without touching the notes.

Fold (collapse) or unfold a group track. Errors if the track is not a group track (see get_group_info).

Set the global Groove Amount (0.0 to 1.0), which scales how strongly every clip's assigned groove is applied across the whole set.

Set the global Arrangement loop region and its enabled state. `start` is an absolute beat and `length` is a positive beat duration. The region is updated even when `enabled=false`; playback simply will not repeat it. Use set_clip_loop for a Session clip's loop braces, not the Arrangement.

Set one enabled parameter on a device in the Master track's chain. Call get_master_device_parameters first and use its parameter name/index and native min/max; numeric out-of-range values are clamped. Display strings with supported units or exact enum labels also work; unsupported mappings fail before writing. This affects the full mix. Read back the resulting display. Use set_device_parameter for a regular track or set_return_device_parameter for a return track.

Set the Main/Master track volume. Range 0.0-1.0 where 0.85 = 0 dB.

Turn Live's metronome click on/off.

Arm or disarm Live's global Arrangement Record state. `true` enables Arrangement recording; `false` disables it. Enabling alone does not record: arm the intended tracks with set_track_arm, then use start_playback. Use set_session_record or trigger_session_record for Session slots instead. Repeating the current state has no additional effect.

Set one enabled parameter on a device in a return track's chain. Call get_return_device_parameters first and use its parameter name/index and native min/max; numeric out-of-range values are clamped. Supported display-unit strings and exact enum labels also work; unsupported mappings fail before writing. Use set_device_parameter for a regular track or set_master_device_parameter for the full-mix chain.

Rename one Session-view scene without changing any clips in the row. Use set_clip_name for an individual clip. Repeating the same name has no additional effect.

Set a track's send level (send_index 0 = Return A, 1 = Return B, ...). Range 0.0-1.0.

Toggle recording of parameter changes into Session clip envelopes - an alternative to write_automation for captured knob rides.

Toggle Session record (records into armed tracks' selected Session slots; also enables MIDI overdub into playing clips).

Set a Simpler device's playback mode: 0 = Classic, 1 = One-Shot, 2 = Slicing. Slicing chops the sample into playable slices, central to lofi/hip-hop sampling. Errors if the device at that index is not a Simpler.

Set the song's key context. root_note 0-11 (0=C, 2=D...), scale_name e.g. "Major", "Minor", "Dorian". Read current values via get_session_info.

Set the global swing amount (0.0 to 1.0) used when quantizing with swing.

Set the tempo of the Ableton session. Parameters: - tempo: The new tempo in BPM

Set the Live set's global time signature, such as 4/4, 3/4, or 6/8. This changes bar/grid and metronome interpretation but does not rewrite clip notes. Use set_clip_signature instead when only one clip needs a different meter for polymeter. Repeating the same signature has no additional effect.

Arm or disarm a track for recording (fails on tracks that can't be armed, e.g. group/return tracks).

Set a track's color by index (0-69 in Live's palette).

Set input monitoring: 0=In (always hear input), 1=Auto, 2=Off. Required for resampling/bounce workflows.

Set one regular track's mute state (`true` mutes; `false` unmutes). Muting silences that track in Live but preserves its clips, devices, and mixer settings. Use set_track_solo to audition a track relative to the rest, or stop_clip when only Session clip playback should stop.

Set the name of a track. Parameters: - track_index: The index of the track to rename - name: The new name for the track

Set one regular track's stereo pan position; 0.0 is centered. Live clamps the value to the track's native range. This changes mixer state, not the audio file or clip content. Use set_master_device_parameter for a device control, and set_crossfader for A/B crossfading.

Set track routing by display name. field: input_routing_type | output_routing_type | input_routing_channel | output_routing_channel. Enables sidechain sources, bus routing, and resampling (route a track's output into another track's input, arm, record). Get options from get_track_routing first.

Set one regular track's solo state (`true` solos; `false` unsolos). Solo changes monitoring relative to other tracks and does not alter clip or device content. Other tracks may remain soloed, so clear them separately when exclusive auditioning is required. Use set_track_mute to silence this track.

Set track volume. Range 0.0-1.0 where 0.85 = 0 dB (unity gain).

Bootstrap a session in one call: set tempo and create named MIDI tracks, optionally loading an instrument found by name for each. tracks: [{"name": "Drums", "instrument": "drum kit"}, {"name": "Bass", "instrument": "upright bass"}, ...]. "instrument" is a search_browser query (best match is loaded); omit it to create an empty track. Returns a per-track report with the loaded item names.

Start Arrangement playback from the current song time. NOTE: the response reports the PRE-command state (may say playing=false right after starting) - confirm with get_session_info.

Stop every playing Session clip (does not stop the transport).

Stop the browser preview started by preview_browser_item.

Stop playing a clip. Parameters: - track_index: The index of the track containing the clip - clip_index: The index of the clip slot containing the clip

Stop playback. NOTE: the response reports the PRE-command state - confirm with get_session_info.

Switch Ableton's main window to the Arrangement view. Parameters: