iOS apps that use audio affect the sound quality of sound playing in Mac apps

Originator:recordtronic
Number:rdar://FB9084433 Date Originated:4/20/21
Status:Open Resolved:
Product:macOS Product Version:11
Classification:Incorrect/Unexpected Behavior Reproducible:Yes
 
It’s a weird quirk that playing audio in an app in the Xcode Simulator affects the audio output from Mac apps, but it’s a serious bug that running an iOS app on an m1 Mac does the same.

Steps to reproduce.
- Install the iOS version of the podcast app Overcast (I don’t think it matters what app you use, as long as it can play audio).
- Play the “Springloaded” video in Safari, make sure you can hear the audio.
- Open Overcast for iOS on the Mac, you don’t need to play anything in Overcast.

Expected:
- Neither app’s audio is affected by the other.

Actual:
- The sound playing in Safari is severely degraded.

The same thing happens when using the Simulator,.

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