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Focus an audio lane or Master, then open FX → WAV. The waveform mode buttons choose Granular wave mode or Smooth curve timer mode.
Audio waveform and Wave Sculpt panel with Crest, Texture, Drive, Fade In, Fade Out, and Reset.

Example project in the current Rawchunks app.

Shape the audio

In Granular mode, drag vertically on a wave peak to change its shape. A horizontal mouse drag selects a time range; a held or vertical drag sculpts the wave. On a phone, dragging the wave sculpts it; use SECTION for range selection. In Smooth curve mode, drag the curve nodes to adjust a broader part of the clip. Fade handles at the upper corners change its entrance and ending. Clear a range selection if its handles get in the way.

Use the controls

Listen while making small changes. Undo can return to a recent state; commit a snapshot before a larger experiment.