1707024 - After enabling Multi-Output audio device on Mac, the microphone is using the output device

Status: RESOLVED FIXED

(Core :: Audio/Video: cubeb, defect, P1)

Description

[Luis Aurelio Casoni]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:88.0) Gecko/20100101 Firefox/88.0

Steps to reproduce:

Firefox 87 installed two weeks ago, recently upgraded to Firefox 88, on macOS Catalina 10.15.7, installed on iMac 2019 device.

I have added the IShowU and Blackhole virtual audio plugins, and created two multi-output audio devices on my machine, routing the desktop audio to OBS capture, for recording my meetings.

After this, I have selected the multi-audio device as my default output device. But the external microphone is always marked as default input device.

After enabling the device, I have open the Firefox app, and open a Google Meet window, and entered in a meeting.

Actual results:

If selected any of multi-audio devices on my machine as my default output device, the microphone on Firefox is routed as desktop output audio. In other words, the participantes on meeting is hearing the desktop output, not my microphone.

If I enabling an ordinary audio device as default input device (headset), the microphone is working as expected on Firefox.

When I open a Chrome window, on same machine, on same multi-output device enabled, the microphone is working is expected.

Expected results:

The microphone should working if any output device is enabled.

Comment 1

[Luis Aurelio Casoni]

Attachment: Audio and Midi Devices

Comment 2

[Luis Aurelio Casoni]

Attachment: Output devices

Comment 3

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::Audio/Video: cubeb' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.

Comment 4

[Matthew Gregan [:kinetik]]

Chun-Min, this sounds like a device selection issue in the cubeb-coreaudio-rs backend, would you mind taking a look please?

Comment 5

[C.M.Chang[:chunmin]]

I'll take a look. I didn't check the multi-output device before so maybe it's not taken carefully

Comment 6

[C.M.Chang[:chunmin]]

Hi Luis,

Would you mind helping me to get the program log to see what's wrong? The log will be printed on the Terminal console by the following steps:

1. Open Terminal application (Launchpad -> Other -> Terminal)
2. Open firefox by the this command: MOZ_LOG="cubeb:4" /Applications/Firefox.app/Contents/MacOS/firefox
3. Copy the program log printed on the Terminal console and paste it here

Comment 7

[Luis Aurelio Casoni]

Attachment: Cubeb Log

(In reply to C.M.Chang[:chunmin] from comment #6)
> Hi Luis,
> 
> Would you mind helping me to get the program log to see what's wrong? The log will be printed on the *Terminal* console by the following steps:
> 
> 1. Open *Terminal* application (Launchpad -> Other -> Terminal)
> 2. Open firefox by the this command: `MOZ_LOG="cubeb:4" /Applications/Firefox.app/Contents/MacOS/firefox`
> 3. Copy the program log printed on the *Terminal* console and paste it here

Chun, this is my log. The steps are:

1. Opened Firefox with Ordinary Device (Headset) Enabled
2. Opened a Google Meet tab
3. Speaked some words. The Microphone is detected.
4. After this, I have enabled the multi-audio device (OBS Blackhole). 
5. Speaked some words on microphone, Meet not detected never I heard.
6. Opened a Youtube video, the output audio is detected from Meet as input device.
7. I have pause the Youtube video, and reenabling the Headset as primary output device.
8. The microphone is detected again.

This is my log:

```

```

Comment 8

[Luis Aurelio Casoni]

(In reply to C.M.Chang[:chunmin] from comment #6)

Hi Luis,

Would you mind helping me to get the program log to see what's wrong? The log will be printed on the Terminal console by the following steps:

1. Open Terminal application (Launchpad -> Other -> Terminal)
2. Open firefox by the this command: MOZ_LOG="cubeb:4" /Applications/Firefox.app/Contents/MacOS/firefox
3. Copy the program log printed on the Terminal console and paste it here

Chun, this is my log. The steps are:

1. Opened Firefox with Ordinary Device (Headset) Enabled
2. Opened a Google Meet tab
3. Speaked some words. The Microphone is detected.
4. After this, I have enabled the multi-audio device (OBS Blackhole).
5. Speaked some words on microphone, Meet not detected never I heard.
6. Opened a Youtube video, the output audio is detected from Meet as input device.
7. I have pause the Youtube video, and reenabling the Headset as primary output device.
8. The microphone is detected again.

My log is attached on this message.

Thanks for your attention.

Comment 9

[C.M.Chang[:chunmin]]

Set NI as a reminder

Comment 10

[C.M.Chang[:chunmin]]

Luis, can you check if this problem still happen? We might fix this when dealing other problems (https://github.com/mozilla/cubeb-coreaudio-rs/pull/153).

Comment 11

[Luis Aurelio Casoni]

(In reply to C.M.Chang[:chunmin] from comment #10)

Luis, can you check if this problem still happen? We might fix this when dealing other problems (https://github.com/mozilla/cubeb-coreaudio-rs/pull/153).

Hello Mr. Chang, sorry for my delayed response.

The iMac 2019 is from my old employer. But, because my resignation on my previous work, in March, i don't use more Mac devices. I'm sorry for my impossibility for testing this bug. I hope this corrections have fixed this problem.

Thanks for your work.

Comment 12

[Paul Adenot (:padenot)]

Thanks Luis, I've juste reproduced the setup you described in your initial comment, and it looks fixed: audio input and output are routed appropriately now, after the changes of https://github.com/mozilla/cubeb-coreaudio-rs/pull/153.

I'm closing this, let us know if you find any issue in the future!