Extremely simple audio recording app.
Piezo for Mac successfully detects and records the output coming from your apps or built-in mic and allows you to save the recording as an MP3 or AAC file. This premium app comes with a demo mode and features a pleasing skeuomorphic design that resembles a physical recorder. Overall, the software works well but is limited to recording from only one source at a time.
Record any sound playing through sound card, microphone, or both.
Professional digital dictation recorder for Mac OS X. Record and send dictation.
Slow down music with no pitch change.