1508563 - mono audio only on left speaker of G930 headset

Status: RESOLVED DUPLICATE of bug 1567949

(Core :: Audio/Video: MediaStreamGraph, defect, P3)

Description

[Djfe]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:65.0) Gecko/20100101 Firefox/65.0

Steps to reproduce:

I played certain mono audio files in a certain way:
once voice messages on Telegram
once voice recordings on https://voice.mozilla.org/de/listen

both are mono files
Telegram ogg, Common Voice mp3

I'm using Windows 10 64bit Education edition with Firefox Nightly 64bit


Actual results:

They only play in mono when I open the webpage with my Logitech G930 headset enabled.

If I open/reload the webpage with my default Realtek soundcard (asus vIII Ranger) enabled, then the mono sound is coming from my left and right speakers. If I then enable my headset in the windows soundsettings, then the sound is played on both ears (of the headset).

If I then open/reload the webpage with my G930, then the mono sound gets only to my left ear. If I then disable my headset in the windows soundsettings, then the sound is played only over the left speaker (plugged into my soundcard)

Reloading the page with the soundcard enabled again and the sound is stereo again.

Chrome doesn't have this problem on the mentioned pages.
I haven't found any other page that is affected (yet)

I've updated my logitech software (and driver I think) to 9.02.65 (the current version), but that didn't fix the issue.

If I play a file on soundcloud at the same time, then the file from Telegram/Common Voice only gets to my left ear but soundcloud satisfies both channels.

I don't know what causes this, but release is affected as well and I don't know what causes it.
I only noticed it today, since mono files are relatively rare on the web.

I didn't encounter this on Common Voice before even though I used the same headset on that page a few months back.
That might be due to them changing how sounds are played (very well possible, since they changed the websites design a few months back) or due to a regression before 63.

How can I help in debugging this?

Comment 1

[Djfe]

I forgot something important:
Opening the link to the mp3's of common voice directly leads to them being played directly in the browser, but the sound is always stereo.
It only happens on these webpages (reliably/every time).

I haven't been able to reproduce this with a small html file. (I tested <audio> and playing audio from js, both worked fine with the telegram voice message (stereo))

Comment 2

[Djfe]

*not link, I meant URL (you can get the URLs through the network activity monitor of Firefox)

Comment 3

[Djfe]

The issue could also be due to changes in Windows 1809 (I updated to that version last week or so)

Comment 4

[Alex Chronopoulos [:achronop]]

With your Logitech G930 device attached can you please post here your about:support page.

Comment 5

[Paul Adenot (:padenot)]

Maybe those files are being played back via Web Audio, in which case we could have the channel mapping wrong.

Reporter, can you provide your about:support page ?

Comment 6

[Djfe]

Attachment: G930.json

I created a fresh/new profile and then copied the json info from about:support and saved it as a file.
The bug is present in the fresh profile.

Comment 7

[Djfe]

I found another page that is affected:
https://webaudioapi.com/samples/oscillator/

So it definitely seems to be web audio related

Comment 8

[Alex Chronopoulos [:achronop]]

Your Logitech G930 device has 8-channels. I can reproduce the error with my multichannel device.

Comment 9

[Alex Chronopoulos [:achronop]]

MSG logs from https://voice.mozilla.org/de/listen

[Child 6050: Main Thread]: I/cubeb media.cubeb.sandbox: true
[Child 6050: Main Thread]: D/cubeb media.audioipc.pool_size: 2
[Child 6050: Main Thread]: D/cubeb media.audioipc.stack_size: 262144
[Child 6050: Main Thread]: D/MediaStreamGraph 0x7f7dfc7f9400: AudioCallbackDriver ctor
[Child 6050: Main Thread]: D/MediaStreamGraph Starting up MediaStreamGraph 0x7f7dfc7f9400 for window 0x7f7dfebce820
[Child 6050: Main Thread]: D/MediaStreamGraph 0x7f7dfc7f9400: Running stable state callback. Current state: LIFECYCLE_THREAD_NOT_STARTED
[Child 6050: Main Thread]: D/MediaStreamGraph 0x7f7dfc7f9400: Starting a graph with a AudioCallbackDriver
[Child 6050: Main Thread]: D/MediaStreamGraph Starting new audio driver off main thread, to ensure it runs after previous shutdown.
[Child 6050: CubebOperation #1]: D/MediaStreamGraph 0x7f7dfc7f9400: AsyncCubebOperation::INIT driver=0x7f7df5c36c80
[Parent 5786: Unnamed thread 0x7fa47e521820]: E/cubeb media/libcubeb/cubeb-pulse-rs/src/backend/stream.rs%s:%d: Output buffer attributes maxlength {}, tlength {}, prebuf {}, minreq {}, fragsize {}
%s:%d: Input buffer attributes maxlength {}, tlength {}, prebuf {}, minreq {}, fragsize {}
%s:%d: Input callba
[Parent 5786: Unnamed thread 0x7fa47e521820]: E/cubeb media/libcubeb/cubeb-pulse-rs/src/backend/stream.rs%s:%d: Output buffer attributes maxlength {}, tlength {}, prebuf {}, minreq {}, fragsize {}
%s:%d: Input buffer attributes maxlength {}, tlength {}, prebuf {}, minreq {}, fragsize {}
%s:%d: Input callba
[Child 6050: AudioIPC0]: D/MediaStreamGraph AudioCallbackDriver State: 0
[Child 6050: CubebOperation #1]: D/MediaStreamGraph 0x7f7dfc7f9400: AudioCallbackDriver started.
[Child 6050: AudioIPC1]: D/MediaStreamGraph 0x7f7dfc7f9400:  Adding media stream 0x7f7df5867430, count 1
[Child 6050: AudioIPC1]: I/MediaStreamGraph MediaStream 0x7f7df5867430 Adding AudioOutput for key 0x7f7e1baceb50
[Child 6050: AudioIPC1]: D/MediaStreamGraph 0x7f7dfc7f9400: Adding media stream 0x7f7df5867600, in the suspended stream array
[Child 6050: AudioIPC1]: D/MediaStreamGraph 0x7f7dfc7f9400: Adding MediaInputPort 0x7f7df5886580 (from 0x7f7df5867600 to 0x7f7df5867430)
[Child 6050: AudioIPC1]: D/MediaStreamGraph 0x7f7dfc7f9400: Updating AudioOutputStreams for MediaStream 0x7f7df5867430
[Child 5874: MediaPlayback #3]: I/cubeb media.cubeb.sandbox: true
[Child 5874: MediaPlayback #3]: D/cubeb media.audioipc.pool_size: 2
[Child 5874: MediaPlayback #3]: D/cubeb media.audioipc.stack_size: 262144
[Child 6050: AudioIPC0]: D/MediaStreamGraph 0x7f7dfc7f9400: Adding media stream 0x7f7df58682b0, in the suspended stream array
[Child 6050: AudioIPC0]: D/MediaStreamGraph 0x7f7dfc7f9400: Adding MediaInputPort 0x7f7df443a4c0 (from 0x7f7df58682b0 to 0x7f7df5867600)
[Child 6050: AudioIPC1]: D/MediaStreamGraph MediaStream 0x7f7df58682b0 will finish
[Child 6050: AudioIPC1]: D/MediaStreamGraph 0x7f7dfc7f9400: Removed media stream 0x7f7df58682b0, count 1

Comment 10

[Djfe]

yes, it has 8 channels.
or rather up to 8.

it has a button to switch between stereo and 7.1 mode.

it's almost all of the time running in stereo mode though.

https://support.logitech.com/en_ch/article/18151

Comment 11

[phamster]

I experience a similar with Logitech G933 when playing back this link https://360.articulate.com/review/content/1553b6d0-80cc-40be-be20-13e000fd9615/review

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:64.0.2) Firefox/64.0

Comment 12

[phamster]

I just updated to Firefox 65.0 today, and the link https://360.articulate.com/review/content/1553b6d0-80cc-40be-be20-13e000fd9615/review plays back mono audio in left speaker only when using a 7.1 surround headset.