I might add that if you’re looking purely for a sample editor, so no multitrack, on OS X, Twistedwave for me feels closest to the CoolEdit I grew up on. Audacity’s is probably the first one to try because FLOSS. I struggle with its UI at times—although maybe they’ve implemented scroll to zoom since I last tried it. And I don’t like how everything’s conceptualised as a ‘project’ that needs to be exported, even when working on a single file. I just want to open a file, modify and save it. Gimp made a similar mistake at some point…