Use "pre-compiler constants" to indetify as "USB" and not as "Virtual" interface?

[varoudis]

Some apps will not work with "Virtual" interfaces and require their master out to be controlled from the central MacOS Settings->Sound and by setting "Output" to a USB device.

Is it possible to compile BalckHole to look like a USB interface?

[devinroth]

Absolutely. I’ll add this to the list. In fact, I might just change it to USB by default because of that fact.

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On Mar 6, 2024 at 7:56 AM -0800, Dr Tasos Varoudis ***@***.***>, wrote: Some apps will not work with "Virtual" interfaces and require their master out to be controlled from the central MacOS Settings->Sound and by setting "Output" to a USB device. Is it possible to compile BalckHole to look like a USB interface? — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[gchilds]

I've wondered about "built-in" or even a "depends who's asking" response.

[varoudis]

What do I need to change to build it as USB?

[gchilds]

In this line

https://github.com/ExistentialAudio/BlackHole/blob/master/BlackHole/BlackHole.c#L2543

change kAudioDeviceTransportTypeVirtual to kAudioDeviceTransportTypeUSB

The constant appears in another place, as kAudioBoxPropertyTransportType. I have absolutely no idea what a box is or if it will affect your USBness.

[varoudis]

I can confirm that changing to "kAudioDeviceTransportTypeUSB" in two lines in the code did the trick!

Worked like a charm. In my case, I also removed 44.1 and below my output app is a mess and changes from 48 to 44.1 without asking...
All ok.