Macbook Audio Driver

Resetting the audio driver without rebooting:

MacBook speakers are physically tiny. The driver contains a massive FIR (Finite Impulse Response) filter that boosts frequencies around 200–300 Hz to fake bass. This is not done in hardware; it's done in the IOAudioEngine kernel thread. macbook audio driver

This force-quits the audio daemon, which macOS will immediately relaunch, effectively "refreshing" your driver. Method B: Activity Monitor which macOS will immediately relaunch

When Spotify, Zoom, and QuickTime play simultaneously, they each send separate PCM streams. The kernel driver cannot mix. Instead: and QuickTime play simultaneously