Starting from Chrome version 9842.0

The diff of Chrome:
https://chromium.googlesource.com/chromium/src/+log/62.0.3176.0..62.0.3185.0?pretty=fuller&n=10000

Using https://online-voice-recorder.com/:

The error messages in /var/log/chrome/chrome when recording should start:

[1:1:0816/120749.311022:ERROR:validation_errors.cc(87)] Invalid message: VALIDATION_ERROR_DESERIALIZATION_FAILED

Using https://webrtc.github.io/samples/src/content/peerconnection/audio/:

The error messages in /var/log/chrome/chrome when recording should start:

[1:16:0816/120856.312325:ERROR:adm_helpers.cc(62)] Failed to query stereo recording.
[1:16:0816/120856.315538:WARNING:delay_based_bwe.cc(303)] BWE Setting start bitrate to: 300000
[1:16:0816/120856.325040:WARNING:delay_based_bwe.cc(303)] BWE Setting start bitrate to: 300000
[1:1:0816/120857.744075:ERROR:validation_errors.cc(87)] Invalid message: VALIDATION_ERROR_DESERIALIZATION_FAILED

There are some changes might be related,e.g.:

https://chromium-review.googlesource.com/#/c/chromium/src/+/590515/
https://chromium-review.googlesource.com/#/c/chromium/src/+/612021/

chrome://media-internals player tab shows no input controller.

I will check whether the two CLs are the culprits.