1947709 - The audio input source doesn't automatically switch to the TRRS external microphone when it's plugged in during a Google Meet

Status: RESOLVED INVALID

(Core :: WebRTC: Audio/Video, defect)

Description

[Alexandru Trif, Desktop Test Engineering [:atrif]]

Found in

• 137.0a1 (2025-02-11)

Affected versions

• 137.0a1 (2025-02-011)
• 136.0b4
• 135.0
• 128.7.0esr

Tested platforms

• Affected platforms: Windows 10x64, macOS 14 arm, Ubuntu 24
• Unaffected platforms: none

Preconditions

• TRRS headsets, plugging into the 3.5mm jack of the laptop. They have a single plug, that has four segments (tip, ring, ring, sleeve, hence the name)

Steps to reproduce

1. Join a call on Google Meet without headsets connected.
2. Connect the TRRS headset.

Expected result

• The sound input source is automatically switched to the external micrphone.

Actual result

• The sound input remains the same.

Regression range

• I don’t think this is a regression because this reproduces with Firefox 100.

Additional notes

• The sound input source can be changed manually.
• On Google Chrome the sound input is changed automatically to the external microphone. On Safari the sound input is not changed automatically.

Comment 1

[Jan-Ivar Bruaroey [:jib] (needinfo? me)]

Switching microphone is an application decision, Google Meet's in this case.

The web platform API should be rich enough for them to get the behavior they want. See https://jsfiddle.net/jib1/yvj4narc/ for an example.

Note Firefox grants per-device permission by default, so switching might produce a second permission prompt.