Luckily, in the latest update Apple has made sure that audio editing is a little simpler and a lot more thorough. You can very easily change the overall levels of a clip by clicking a button and dragging the values up and down. You can also, using the audio editing window, apply changes to the EQ of each clip. EQ allows you to change the values of sounds at different frequencies. This may sound advanced, but it’s really not. In our experience, a little bit of simple exploration can lead to huge improvements in sound quality in just a few clicks.
1: Cogs away
Click the Settings cog on a clip that you would like to adjust the sound on. Then, once the menu bar has appeared, click on Audio Adjustments. This will bring up a dedicated window for you to play with.
2: EQ it
Use the EQ values to select a preset or alter the volume levels of different frequencies. Use trial and error to make adjustments, playing the clip back each time. Over time, you’ll learn what works.