Auto stop timer - stop recording after a preset time - handy if you know the length of a song on tape or vinyl.
Apply effects to selected area, zoom in/out, cut/copy/paste/mix, amplify, normalize, echo, stretch, fade in/out, invert, reverse, null signal, insert silence, three levels of undo/redo.
Create WAV files from tapes, vinyl, microphone, mixing deck etc.
Decode MP3 files to WAV, edit, add effects.