Snd is a sound editor modeled loosely on Emacs and an old, sorely-missed PDP-10 sound editor called Dpysnd.
Snd can accommodate any number of sounds at once, each with any number of channels. Each channel is normally displayed in its own window with its own cursor, edit history and marks.
Each sound has a control panel designed to try out various changes quickly. Each sound also has an expression parser, used mainly during searches.
There is an overall stack of regions that can be browsed and edited. Channels and sounds can be grouped together during editing, and edits can be undone and redone without restrictions.
Snd can be customized and extended using C plug-ins or GNU Guile!