Stereo
Choose a section. Place it left or right. Shape the movement between sections.
Drop audio files or a stem ZIP anywhere. Multiple files play together as stems. Use exports from the same song with matching starts. This page does not split stems.
Tracks 0
Drag over a waveform to select time. Click to seek. Click a section to edit it; drag its pan dots up or down. The dashed line previews unsaved changes.
Audio stays on this device. Start with one song, then add stems for separate pan moves.
Export
Stereo · 24-bit WAV
Live preview follows the pan automation without rendering the song. Preview uses shared listening headroom. Export peak headroom may lower the mix; this is not a mastering step.
Ready. Add a song or matching stems.
Help, storage and limits
Left 100% puts the sound on the left output; Right 100% puts it on the right. Stereo inputs use cross-feed panning, so hard panning does not simply discard the opposite channel.
Width 100% retains the existing stereo width. Width 0% folds it to mono; mono source files do not gain width. Check the result with Mono monitor.
Projects save automation and file references, not the audio. Keep your original files and relink them after opening a project. Edits autosave in this browser; save a project file for a portable backup.
Up to 16 lanes, 30 minutes, 1 GiB of decoded source audio and 192 MiB of stereo output. Available memory can impose lower limits. Non-WAV audio and stems at different rates are decoded to the project’s rate. Negative offsets trim audio before time zero.
Space: play/pause · Ctrl/Cmd+Z: undo · Delete: remove selected section. Shortcuts are disabled while typing.