Quicktime audio on Macbook pro

Greetings Videoplan123,

Thanks for visiting the Apple Support Communities! It seems audio isn't clear when listening to playback of a QuickTime recording you've created on your Mac.

• Are you using the built-in microphone from your Mac to record audio?
• Have you had a chance to use a different microphone?

Check if your Mac model has the option under the input settings to use ambient noise reduction:

Change your sound input settings - Apple Support

"To capture less background noise when using your computer’s built-in microphone, select “Use ambient noise reduction.” This option is not available if a 4-channel built-in microphone format is selected in Audio MIDI Setup."

Kind regards.