Time and Pitch
Change tempo and pitch independently, change speed, or resample a track.
On this page4 tools
time_stretchChange the duration without changing the pitch.
Example prompt: stretch track 1 to 4 minutes
Returns: node_id, new_duration_sec
pitch_shiftChange the pitch without changing the duration. Set preserve_formants on voices so a shift sounds like the same person singing higher, not a chipmunk. Range: −12 to +12 semitones.
Example prompt: shift the vocals up 2 semitones
Returns: node_id
change_speedResample a track to change playback speed without pitch preservation. factor > 1 speeds up (shorter duration), factor < 1 slows down (longer).
Example prompt: speed track 1 up by 10%
Returns: node_id
resample_trackResample a track to a different sample rate using linear interpolation. Common rates: 22050, 44100, 48000, 96000.
Example prompt: resample track 1 to 44.1 kHz
Returns: node_id