@audio/stretch-wsola

Waveform Similarity Overlap-Add time stretching. Search ±delta around each synthesis hop for the position that best correlates with the running output — eliminates the flanging of plain OLA, no FFT.

import wsola from '@audio/stretch-wsola'

let out = wsola(samples, { factor: 1.5 })

let write = wsola({ factor: 2 })   // streaming
write(block1)
let tail = write()                  // flush

| Param | Default | | |---|---|---| | factor | 1 | Time stretch ratio | | frameSize | 2048 | Window size | | hopSize | frameSize/4 | Hop between frames | | delta | frameSize/4 | Search range (±samples) |

Use when: speech, real-time, moderate ratios (0.5–2×). Polyphonic music is better served by @audio/stretch-pvoc-lock or @audio/stretch-transient.

Part of @audio/stretch.

License

MIT · ॐ