SonodexPlayer & audio editing
ChatGPT can play tracks and transitions to you in the preview player and render edited copies: shortened, tempo-adjusted, transposed or normalised. The original always stays unchanged.
On this page
Control the playerLink to “Control the player”
With the switch “Assistants may control the player” under Settings → Integrations → “ChatGPT & MCP” (off by default), an assistant may operate the preview player. The “Read library” permission is sufficient for this; without the switch, Sonodex declines any control.
| Tool | What it does |
|---|---|
get_playback_status | Loaded track, position, duration, whether it is playing, volume and whether assistants are currently allowed to control. Also works without the switch. |
load_track | Loads a track paused into the player, at a position if you wish |
play_track, pause_track | Starts or pauses playback |
seek_track | Jumps to a position in the loaded track |
set_preview_volume | Changes the player volume |
audition_transition | Plays the end of one track from its mix-out range and then the start of the next from its mix-in range, 4 to 60 seconds each (default 16), one after the other without a crossfade |
- Sonodex visibly shows every control action: “AI assistant: … is controlling the player” with the action. “Stop” halts playback immediately and takes control away from assistants: the switch “Assistants may control the player” turns off, and further commands are declined. With “Allow again” in the notice you give it back.
- Locked while a dialogue is open in Sonodex.
- At most 30 control commands per minute per assistant. Nothing is saved.
audition_transitionplays both excerpts one after the other, without a crossfade.
Edit audioLink to “Edit audio”
| Tool | What it renders |
|---|---|
trim_audio | Section from–to, with fade-in and fade-out (up to 30 s); cuts snap to beats of the stored beatgrid by default |
adjust_audio_tempo | New tempo (target BPM or factor 0.8 to 1.25), pitch is kept; with Rubberband, otherwise FFmpeg atempo |
transpose_audio | Pitch by −6 to +6 semitones, tempo is kept; without Rubberband via resampling, with a note about the lower quality |
normalize_audio | Loudness according to EBU R128 in two passes to −14 to −6 LUFS, true peak at most −1 dBTP (adjustable) |
render_audio_edit | Several of these steps in one copy, always in the order cut, tempo, pitch, loudness |
- The assistant calls one of the tools. This does not change anything: Sonodex renders a new file in the background; the assistant queries the progress with
get_render_joband cancels its own render withcancel_render_job(without asking; the partial file is deleted). - Once the render is finished, the confirmation dialogue appears with the original and the new file: format, length, BPM, key, target, the measured loudness and “Listen to result”.
- “Apply changes” puts the file next to the original or into your library folder, with a suffix in the name such as “Title (Intro Edit).flac”, and imports it as a new track, linked to the original. Tags and cover are carried over, BPM and key are adjusted. “Cancel” deletes the rendered file; Undo removes the new track and the file again.
- Format: lossless sources (FLAC, WAV, AIFF, ALAC, WavPack) keep their codec; lossy ones become 24-bit FLAC so that no second lossy encoding is added. MP3 at 320 kbit/s is only available on request.
- Changing BPM in the tag is not time-stretching. A new BPM value via the metadata does not change the audio; only
adjust_audio_tempoactually renders it at the new tempo. - Limits: at most 2 renders per assistant and 6 in total, one running at a time; a render is cancelled after 10 minutes, and the result may be at most 60 minutes long.
StemsLink to “Stems”
Sonodex does not offer stem separation. separate_audio_stems and export_audio_stems always answer with unsupported_operation (reason stem_engine_missing). get_available_stems only lists stem files that already sit next to the track or in a folder with its name, and whether the file itself is a stem file (.stem.mp4).
SharesLink to “Shares”
| Task | Permission | Switch in Sonodex |
|---|---|---|
| Player status, render status, existing stems | Read library | – |
| Control the player | Read library | Assistants may control the player |
| Edit audio, cancel your own render | Edit tracks | Assistants may propose changes |
ExamplesLink to “Examples”
- “Play me the transition from ‘Velvet Room’ into ‘Coastline’.”
- “Make me an intro edit of ‘Glasshouse’: the first 32 bars, with a short fade-out.”
- “Bring ‘Coastline’ to 126 BPM and normalise it to −9 LUFS.”
Something missing or wrong? Let us know. The app interface is available in English and German.