macOS Multi-Output devices missing from audio device list

[JoshCooley]

Checklist:

• I have checked that there are no issues with similar or the same content

  YOU SHOULD CHECK CLOSED ISSUES ASWELL

• I have checked the FAQ (https://github.com/MarshallOfSound/Google-Play-Music-Desktop-Player-UNOFFICIAL-/wiki/FAQ) and the answer I am looking for is not there

• I have double checked and can reproduce the issue

OS: macOS Catalina 10.15.2 (Darwin Kernel Version 19.2.0: Sat Nov 9 03:47:04 PST 2019; root:xnu-6153.61.1~20/RELEASE_X86_64)

GPMDP Version: 4.6.1

Issue Descriptions:
Multi-Output devices do not appear in the list of Audio Devices under Desktop Settings > PLAYBACK.

macOS supports Multi-Output audio devices, which are essentially virtual audio output devices that tie multiple real output devices together. All sound played to the Multi-Output device will play on all devices contained within the multi-output group.

If a Multi-Output device is set as the system default output device, GPMDP will use it correctly.

Steps to Reproduce:

1. Create a Multi-Output device via Audio MIDI Setup.app
   

2. Open GPMDP. Go to Desktop Settings and click the PLAYBACK tab. Expand the list of audio devices and note that the Multi-Output device you configured does not appear.
   

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[JoshCooley]

This looks like an electron issue. Running navigator.mediaDevices.enumerateDevices().then(devices => console.log(devices)) shows all devices but the Multi-Output device. The same command on a new project with electron@7.1.5 shows everything. I haven't seen any issues or changelogs for electron that include this issue, and I'm still trying to narrow down the fix version.

Edit: This was fixed in electron@4.0.0, I'm guessing here: electron/electron#15948

[jostrander]

I see. I have a patch that migrates us to electron 4, can you check that and see if that solves this for you?

#3588

[JoshCooley]

Yep, all devices are listed on feature/electron4:

[jostrander]

So this will be fixed when that gets merged..whenever that happens.