How do I edit wav files on my mac air?

Hi lyndafromkingston,

I see that you would like more information about editing files in QuickTime. Here is an article for you that can give you some steps to help you accomplish this:

Mac Basics: QuickTime Player creates, plays, edits, and shares video and audio files - Apple Support

http://support.apple.com/en-us/HT201066

Editing content

QuickTime Player lets you easily edit content you've created or downloaded. You can trim, combine, and rearrange clips. When you're done, just save or export your finished video.

Trimming

To remove unwanted footage from your media:

1. Open the file in QuickTime Player.
2. Choose Edit > Trim. The trimming bar appears.
3. To select the portion of the recording you want to keep, drag the yellow trimming bar handles to the left and right as desired.
4. When you are satisfied with your selection area, click Trim. The unwanted footage outside the the yellow trimming bar is removed.

Thanks for coming to the Apple Support Communities!

Cheers,

Braden