A step-by-step video tutorial explaining keyframes and how to use them to adjust audio in Final Cut Pro X.
This short video tutorial shows how to use DeHummer in Adobe Audition CC to remove audio hum.
This video tutorial shows how to use Audition’s Multiband Compressor to boost soft passage and even out levels.
The purpose of the Limiter filter in FCP X is to make soft audio louder while preventing the louder passages from distorting (which happens when audio levels exceed 0 dB). In fact, when used properly, the Limiter filter virtually guarantees that your audio won’t distort; as this article explains.
A while ago, I wrote about how and why to create submixes in Soundtrack Pro. While submixes can be used for reverb, a better way is to use Sends and Busses. This provides greater control and more flexibility than a Submix, but it is a bit trickier to understand.