TwistedWave is a very easy to use audio editor.
Create your own iPhone ringtones!
TwistedWave supports Audio Unit and VST plug-ins. Use the Audio Units provided by Apple, or find the particular effect you wanted from the hundreds of Audio Unit or VST plugins available on the internet.
TwistedWave uses the DIRAC Time Stretch/Pitch Shift technology licensed from The DSP Dimension, one of the most advanced algorithms for time-based manipulation of audio material available today.
Use the batch processing to apply the same sequence of effects to a list of files.
Automatically detect silences to split a large file into smaller ones.
TwistedWave works great as an audio converter. It is able to read and export sound files in many formats, including: wav, aiff, au, snd, sd2, mpg, mp2, mp3, mp4, m4r (iPhone ringtones), m4a (iTunes), m4b (audiobooks), aac, caf, flac, ogg/vorbis, wma, WavPack, Wave64.