1896888 - Audio shortly distorted when muting/unmuting tab while playing YouTube video

Status: RESOLVED FIXED

(Core :: Audio/Video: Playback, defect, P2)

Description

[Claas Augner [:claas]]

1. Open https://www.youtube.com/watch?v=B4eRs6VFwlY in Firefox Nightly.
2. Play the video.
3. Mute the tab and then unmute it again.

Expected: The audio should resume normally.

Actual: The audio is shortly distorted (lower speed, lower pitch).

Comment 1

[Claas Augner [:claas]]

Here's a media playback profile, as requested by :padenot: https://share.firefox.dev/3WGIchg

Comment 2

[Paul Adenot (:padenot)]

I'm having a hard time finding a range for this one.

Comment 3

[Gian-Carlo Pascutto [:gcp]]

I'm seeing this on: https://www.reddit.com/r/chess/comments/1csfyne/league_of_legends_streamer_caedrel_learns_en/

No exact STR though.

Comment 4

[Erich Gubler [:ErichDonGubler]]

Attachment: Bug 1896888 repro with sine wave (480p).mp4

Comment 5

[Erich Gubler [:ErichDonGubler]]

I can observe this with the STR in the Description. For my case, it is important to mute and unmute in less than a second, otherwise it doesn't reproduce.

I think an easier video to observe this bug is with a sine wave test tone, like with https://www.youtube.com/watch?v=PyD9cMarVJk; this video plays a single tone for about 6 minutes, which makes it easy to detect a change for most audio-able users.

I've attached Bug 1896888 repro with sine wave (480p).mp4 to demonstrate the above.

Comment 6

[Paul Adenot (:padenot)]

Very cool repro Erich, clearly much more hearable with the sine wave. Let attempt to find a regression range with that instead, maybe we'll be more successful.

gcp, Erich, were you also on macOS or are you on other OSes? I know Claas usually runs macOS and I also did repro myself on macOS. I can't seem to be able to repro on Windows.

Comment 7

[Gian-Carlo Pascutto [:gcp]]

I believe I was on macOS.

Comment 8

[Erich Gubler [:ErichDonGubler]]

Paul: I was actually on Windows 11. I can get more information about component versions, etc. if you want.

Comment 9

[Jim Mathies [:jimm]]

hmm, can't reproduce this. Windows 11.

Comment 10

[Jim Mathies [:jimm]]

Actually I can reproduce this, you have to click the speaker icon repeatedly to get it. The distortion only lasts for < 1 sec.

Comment 11

[Jim Mathies [:jimm]]

Mathew, any thoughts on this?

Comment 12

[Chobits1717]

Distortion only last for one second on my end, though it doesn't lower in speed/pitch, the quality drops and it sounds like one does on a voice call on a bad connection.

Comment 13

[Chobits1717]

Video of the audio distortion I am experiencing:
https://bugzilla.mozilla.org/attachment.cgi?id=9404492

Comment 14

[Chobits1717]

Did some more testing, the distortion mainly happens with speakers plugged in (the distortion is simply replaced by a short period of silence using my built-in speakers instead). Seems to be most prevalent right after Windows switches audio output. Seemingly it stops after a short time, though that's the only pattern I could discern. Does not happen at all in Edge or embedded videos in Discord, only in Firefox.

Comment 15

[Chobits1717]

Any updates on this? Still having this issue with on-and-off audio distortion.

Comment 16

[Chobits1717]

No longer blocks? What does that mean?

Comment 17

[Gian-Carlo Pascutto [:gcp]]

No longer blocks? What does that mean?

No longer blocks: media-triage

They looked at how to prioritize this vs other bugs they need to fix.

Comment 18

[Paul Adenot (:padenot)]

This was probably fixed by bug 1900972, can people retry on nightly?

Comment 19

[Erich Gubler [:ErichDonGubler]]

Cannot reproduce on MacOS and Windows now, where the reproduction was reliable and easy. Seems fixed to me!

Comment 20

[Paul Adenot (:padenot)]

Thanks, Erich, for confirming! Closing.