1706131 - [Bug] Popping/crackling sounds when playing audio via bluetooth in fast forward mode

Status: RESOLVED WORKSFORME

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

Description

[Kevin Brosnan [Ex-Mozilla]]

From github: https://github.com/mozilla-mobile/fenix/issues/19102.

Steps to reproduce

Play any audio (or video with sound) via bluetooth in the fast forward mode (Youtube, Vimeo, ...). E.g. this video with x1.25, x1.5, x1.75, x2 speed.

When Chrome or Samsung Internet is used, everything is fine.

Expected behavior

No popping/crackling sounds like when listening via wired head phones, speakers, ...

Actual behavior

Popping/crackling sounds when playing audio via bluetooth.

Device information

• Device vendor / model and Android version: Samsung A40 / Android 11
• Firefox for Android version: 87.0.0-rc.1

Change performed by the Move to Bugzilla add-on.

Comment 1

[Bryce Seager van Dyk [:bryce] (he/him) - Not reading bugmail]

:kinetik, does this sound backend related?

Comment 2

[Matthew Gregan [:kinetik]]

Possibly, but could be underruns or a bug in playbackRate handling for 16-bit audio also. I wonder if the issue recovers immediately after reverting playbackRate to 1.0. We'll need to gather more detail to narrow the cause down. I don't have access a suitable device to test with, but if someone can reproduce this I have a few suggestions:

1. Try setting the pref media.cubeb.backend to aaudio, restarting, and retesting.
   If this helps, likely suggests an issue with the default (opensl) backend. Otherwise, if the issue is still reproducible with aaudio, please revert the pref change.
2. Grab a profile via about:profiling using the Media preset while the issue is occurring.
3. Enable logging (MOZ_LOG=AudioStream:5,cubeb:5) and reproduce the issue, attaching the resulting logs for analysis.

Comment 4

[Mira Lobontiu (Android QA)]

This issue no longer reproduces on the latest RC 152.0.5, nor on the Nightly 154.0a1 from 7/12 using Energy Neckband 3 headphones, and Samsung Galaxy Z Fold 4 (Android 16).
Closing as WORKSFORME.

Comment 5

[BugBot [:suhaib / :marco]]

Since nightly and release are affected, beta will likely be affected too.
For more information, please visit BugBot documentation.

Comment 6

[Mira Lobontiu (Android QA)]

Not reproducing on Beta 153.0b11 neither.