WaveJelly is a simple to use waveform viewer for the Mac. You have full view of the audio waveform plus a magnifying glass zoom cursor. It allows you to see your audio without the need for expensive software or activation codes.
Sorry, no editing features nor mp3/mp4 support. Although editing is part of our planned future features, proprietary formats are not being considered at this time due to licensing issues.
WaveJelly is currently in its feature definition stage for its next release, and will become Open Source right after its initial refactoring process. Want to help, drop us an email!