Apple Remote Desktop High Performance Screen Sharing Type Issues

Ah, in ARD there's a button you can add to the toolbar (right/control click the toolbar > Customize) and add the Dynamic button. I found mention of the button in this Apple doc: Share the screen of another Mac - Apple Support

This has been affecting me too since this feature was added to ARD in macOS Sonoma.

I have just observed in my audio routing setup (I use a mixer to hear multiple devices on the same speakers) having my "remote" Mac connected to the 3.5mm headphone jack causes noise and audio glitches when the connection is set to the "High Performance" mode and the connection is started.

(I did also notice that changing the display resolutions did cause some change, some very bad, some less bad but still bad. So I have a suspicion that this is somehow related to the video signal getting mixed up with audio.)

I notice that unplugging the headphone cable during the established connection makes no change to the noise, but if I disconnect and reconnect while the cable is unplugged, the noise does not return, and audio plays clear. I can reconnect the 3.5mm cable and the audio remains clear (although, due to the nature of the remote Mac's audio being routed via ARD High Performance, it does not show on the mixer channel I use for my work computer).

Now, to the point of audio calls. macOS Sonoma added a feature called "Voice Isolation" to the OS whenever the microphone and/or camera are enabled. An orange or green item will appear in the menubar to enable features of the microphone and camera (including gesture based effects also available in iOS 17's control center). While the built-in microphone on the MacBook Pro is inferior to the noise canceling mic in my AirPods Max, my work colleagues cannot hear room noise (AC, fans, my clicky mechanical keyboard) when I have "Voice Isolation" enabled.

This feature might need to be enabled per call-type (voice, camera), and perhaps per application (teams, slack, zoom, etc), so do check from time to time that your settings appear correct occasionally.

In this way, I can make a call from the work MacBook Pro in High Performance mode, where the microphone is set to the built-in mic with "voice isolation" enabled on the work computer, my AirPods Max are connected to my personal laptop (the one running ARD and is the "client" of the screen sharing session), and I can hear and speak clearly with my team.

(Also from my side note above, I discovered the Settings > Display option "Dynamic Resolution" allowed the remote computer (16:10 ratio) to fill my 4k Dell display (16:9 ratio) without black bars on the side for once. Although the setting is unset on the next connection, sigh. Would be nice to have that set from the "client" connection.)