1173020 - Request for gum audio for integrated mic in one tab, USB mic in second tab - it's loud and noisy in the first few seconds

Status: RESOLVED INVALID

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

Description

[juan becerra [:juanb]]

+++ This bug was initially created as a clone of Bug #819007 +++

Steps:

1. Load the attached test case in two tabs with a USB mic and integrated mic hooked in
2. Request audio for integrated mic in first tab
3. Request audio for USB mic in second tab

Expected:

Both input sources become active and sound should come in clear from the beginning

Actual:

Both input sources become active, but the sound is very loud initially, and noisy. It eventually normalizes

Comment 1

[juan becerra [:juanb]]

The problem described here is noticeable in my Windows 8.1 machine, where I tested initially. But it isn't noticeable on my Mac.

Comment 2

[:shell escalante]

echo cancellor can get confused initially with 2 speakers giving two streams. can eventually handle.  

ideal test is to remove echo cancellation - both being sent to remote machine - where not set next to it.

Comment 3

[juan becerra [:juanb]]

I tried disabling media.getusermedia.aec_enabled in about:config, but I don't seem to hear a difference. The problem is that this time around I haven't been able to get both mics to work at the same time, and it's quite possible I never got both audio mics to work.

Either way, changing the preference makes no difference. It looks like when the integrated mic is active, the initial sound is loud and noisy before it normalizes.

Comment 4

[juan becerra [:juanb]]

On Mac I am able to get both mics to work, by the way.

Comment 5

[juan becerra [:juanb]]

Marking as new due to the difference in behavior between Mac and Windows, so that it gets retriaged.

Comment 6

[Maire Reavy [:mreavy]]

This is most likely dependent on the OS, driver, and settings of the laptop.  If this generally repeatable across different systems, we can reopen.  The fact that Mac and Windows behaves differently is not surprising.  They have very different audio systems.