TwistedWave: Record audio and easily add effects to it
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TwistedWave is an audio editor with an intuitive interface and a number of solid features. The simple interface makes it easy to record and save your own recordings. Thanks to the wave view, you can quickly analyze and clean up your recordings. TwistedWave also makes it very easy to add samples to your recordings and move sections around.
The most notable feature of the program, though, is probably being able to apply effects even when a process is underway. TwistedWave implements changes fairly quickly, and we suggest listening to your recording afterward to make sure you're satisfied with it. This feature wouldn't be complete without unlimited undo/redo, which gives you a good level of flexibility when editing your audio recording. TwistedWave plays and exports all the popular audio formats you'll come across, including wav, mp3, ogg, and aac.
The only drawback is the price. At $49.90, TwistedWave is a little bit expensive for what is an excellent but very specific type of application. Despite being a little expensive, TwistedWave is an excellent audio editor with intuitive controls.