[BUG] Several advertised tools call Live API members that don't exist (verified on Live 12.4) — group/freeze/annotation/fade/follow-action/MIDI-send are non-functional

[ktkt40208]

Thanks for open-sourcing this — the flat 1:1 LOM-over-TCP surface is handy, and the thread-safe queue design is nice.

While evaluating the tool surface I found that a group of advertised actions reference Live Object Model (LOM) members that don't exist in current Live, so they can never succeed. Because most are guarded with hasattr(...), they don't crash — they quietly return {"ok": false, "error": "... not available"} (and a few return {"ok": true} while doing nothing), so they're easy to miss in a smoke test.

How I verified

Introspected the live LOM on a running Ableton Live 12.4 (Song, Track, MixerDevice, Clip, DeviceParameter) and cross-checked against the official Cycling '74 LOM reference (docs.cycling74.com/apiref/lom/) and the Live 11 API doc archive.

Affected tools (grouped by root cause)

1. Track Groups — create_group_track, group_tracks call Song.create_group_track(), which does not exist. Song only exposes create_audio_track / create_midi_track / create_return_track / create_scene. Creating/ungrouping group tracks is not in the Live API at all (it's a UI-only command, Edit ▸ Group Tracks / Cmd-G) — so this can't be implemented, only documented. ungroup_track currently returns {"ok": true, "message": "Ungroup operation requested (may require manual implementation)"} without doing anything.

2. Freeze / Flatten — freeze_track / unfreeze_track read/write Track.freeze_available and Track.freeze_state; the real members are Track.can_be_frozen (read-only) and Track.is_frozen (read-only), and there is no method to trigger freeze. flatten_track calls Track.flatten(), which doesn't exist.

3. Track delay — get_track_delay / set_track_delay use Track.delay, which doesn't exist.

4. Annotations — get_track_annotation / set_track_annotation use Track.annotation; get_clip_annotation / set_clip_annotation use Clip.annotation. Neither Track nor Clip has an annotation member.

5. Clip follow actions — get_clip_follow_action / set_clip_follow_action / set_follow_action_time use Clip.follow_action_A/B, follow_action_time, follow_action_chance_A/B. None of these exist on Clip. set_clip_follow_action returns {"ok": true, ...} even though the hasattr guards skip every assignment (false success).

6. Clip fades — get_clip_fade_in / set_clip_fade_in / get_clip_fade_out / set_clip_fade_out use Clip.fade_in_time / Clip.fade_out_time, which don't exist on Clip (envelope fades live on Sample as sample_env_fade_in/out).

7. MIDI send — send_midi_cc / send_program_change call Song.send_midi(), which doesn't exist. (A Remote Script sends MIDI through the control-surface layer, not via Song.)

8. Groove amount — get_groove_amount / set_groove_amount use Track.groove_amount; groove is exposed as Clip.groove (a groove object), not a track property.

9. Sub-routing — set_track_input_sub_routing / set_track_output_sub_routing are self-described "simplified implementation" and return {"ok": true, "message": "... limited in LiveAPI"} without changing routing (false success).

10. Take lanes — delete_take_lane calls Track.delete_take_lane(), which doesn't exist (create_take_lane does).

11. Metronome volume — get_metronome_volume / set_metronome_volume read/write Song.metronome, which is the metronome on/off toggle (bool), not a volume. There is no metronome-volume member in the LOM.

Not a bug (for reference): nudge_down (Song.nudge_down exists) and set_clip_signature_numerator (Clip.signature_numerator exists) do work.

Expected behavior

Advertised tools either work, or clearly report that the operation is unsupported by the Live API — rather than returning {"ok": true} on a no-op, or a generic "not available".

Suggestions (happy to send a PR)

• Document that group create/ungroup, track freeze/flatten, track delay, annotations, clip follow actions, clip fades, Song-level MIDI send, and metronome volume are not exposed by the Live API (so they can't be supported), and drop the corresponding entries from the tool count / README table.
• For the "false success" cases (ungroup_track, set_clip_follow_action, sub-routing setters), return {"ok": false, "error": "unsupported by Live API"} so callers/LLMs don't believe the op succeeded.
• Fixable adjacencies if desired: groove is Clip.groove; RAM mode (Clip.ram_mode) and clip time signature (Clip.signature_numerator) do work and could be surfaced correctly.
• Minor: the README links to docs/API_REFERENCE.md and docs/TROUBLESHOOTING.md, which are 404 in the repo.

Environment

• Ableton Live version: 12.4
• OS: macOS
• Verified against the running LOM + Cycling '74 official LOM reference.