** Changed in: pulseaudio (Ubuntu)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1085402
Title:
PulseAudio overuses 'Boost' control of microphone input
I did a small test on two machines I have here, one ALC888 + front mic
and one IDT92xx + internal mic. I tested recording with Capture at +30
dB and Mic Boost at 0 dB, then I tested recording with Capture at 0 dB
and Mic Boost at +30 dB.
For both machines, there was no significant difference in
Some HD-audio codecs (at least ALC269VB and ALC283) become quite noisy on
high Mic Boost levels. So e g, if there is a Mic Boost and a Capture
control, both ranging from 0 dB to +30 dB, you get better quality if
Mic Boost is 0 dB and Capture is +30 dB, than the other way around.
By changing the
Pushed upstream:
http://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/?id=e6051cdf8db554c0bbd4257959c37a7ecc9c10c5
** Changed in: pulseaudio (Ubuntu)
Status: Triaged = Fix Committed
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This was also affecting me, causing very loud hissing on Skype calls.
The change in
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1085402/comments/6
fixes it for me, that is, in /usr/share/pulseaudio/alsa-mixer/paths
/analog-input-mic.conf in the [Element Mic Boost] section, change
the amp-in at audio input has a 30dB gain
Node 0x08 [Audio Input] wcaps 0x10011b: Stereo Amp-In
Control: name=Capture Switch, index=0, device=0
Control: name=Capture Volume, index=0, device=0
Device: name=ALC269VB Analog, type=Audio, device=0
Amp-In caps: ofs=0x0b, nsteps=0x1f,
** Changed in: pulseaudio (Ubuntu)
Status: New = Confirmed
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https://bugs.launchpad.net/bugs/1085402
Title:
PulseAudio overuses 'Boost' control of microphone input producing bad
