[pulseaudio-tickets] [Bug 87814] Microphone has loud static/distortion when volume is not 100%

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87814

--- Comment #28 from Raymond <superquad.vortex2 at gmail.com> ---
(In reply to Vasco Almeida from comment #25)
> Created attachment 112807 [details]
> pulseaudio -vvvvv
> 
> Launch mumble with echo-cancel - recording volume 100%
> Launch pavucontrol - set mumble recoding volume to 66%
> Quit mumble and pavucontrol.

pulseaudio] alsa-mixer.c: Path analog-input-front-mic (Front Microphone),
direction=2, priority=85, probed=yes, supported=yes, has_mute=yes,
has_volume=yes, has_dB=yes, min_volume=0, max_volume=31, min_dB=-16,5,
max_dB=60,75
D: [pulseaudio] alsa-mixer.c: Element Capture, direction=2, switch=1, volume=1,
volume_limit=-1, enumeration=0, required=0, required_any=0, required_absent=0,
mask=0x3600000000f66, n_channels=2, override_map=yes
D: [pulseaudio] alsa-mixer.c: Element Front Mic Boost, direction=2, switch=0,
volume=1, volume_limit=-1, enumeration=0, required=0, required_any=4,
required_absent=0, mask=0x3600000000f66, n_channels=2, override_map=yes
D: [pulseaudio] alsa-mixer.c: Element Front Mic, direction=2, switch=1,
volume=0, volume_limit=-1, enumeration=0, required=0, required_any=4,
required_absent=0, mask=0x0, n_channels=0, override_map=yes
D: [pulseaudio] alsa-mixer.c: Element Rear Mic, direction=2, switch=2,
volume=0, volume_limit=-1, enumeration=0, required=0, required_any=0,
required_absent=0,::::: mask=0x0, n_channels=0, override_map=no
D: [pulseaudio] alsa-mixer.c: Element Rear Mic Boost, direction=2, switch=0,
volume=2, volume_limit=-1, enumeration=0, required=0, required_any=0,
required_absent=0, mask=0x6, n_channels=2, override_map=no
D: [pulseaudio] alsa-mixer.c: Element Line, direction=2, switch=2, volume=0,
volume_limit=-1, enumeration=0, required=0, required_any=0, required_absent=0,
mask=0x0, n_channels=0, override_map=no
D: [pulseaudio] alsa-mixer.c: Jack Front Mic, alsa_name='Front Mic Jack',
detection unavailable
D: [pulseaudio] alsa-mixer.c: Jack Front Mic Phantom, alsa_name='Front Mic
Phantom Jack', detection possible
I: [pulseaudio] alsa-source.c: Successfully enabled deferred volume.
I: [pulseaudio] alsa-source.c: Hardware volume ranges from -16,50 dB to 60,75
dB.
I: [pulseaudio] alsa-source.c: Fixing base volume to -60,75 dB
I: [pulseaudio] alsa-source.c: Using hardware volume control. Hardware dB scale
supported.
I: [pulseaudio] alsa-source.c: Using hardware mute control.
D: [pulseaudio] alsa-util.c: snd_pcm_dump():
D: [pulseaudio] alsa-util.c: Hardware PCM card 0 'HDA Intel' device 0 subdevice
0
D: [pulseaudio] alsa-util.c: Its setup is:
D: [pulseaudio] alsa-util.c:   stream       : CAPTURE
D: [pulseaudio] alsa-util.c:   access       : MMAP_INTERLEAVED
D: [pulseaudio] alsa-util.c:   format       : S16_LE
D: [pulseaudio] alsa-util.c:   subformat    : STD
D: [pulseaudio] alsa-util.c:   channels     : 2
D: [pulseaudio] alsa-util.c:   rate         : 44100
D: [pulseaudio] alsa-util.c:   exact rate   : 44100 (44100/1)
D: [pulseaudio] alsa-util.c:   msbits       : 16
D: [pulseaudio] alsa-util.c:   buffer_size  : 16384
D: [pulseaudio] alsa-util.c:   period_size  : 8192
D: [pulseaudio] alsa-util.c:   period_time  : 185759
D: [pulseaudio] alsa-util.c:   tstamp_mode  : ENABLE
D: [pulseaudio] alsa-util.c:   period_step  : 1
D: [pulseaudio] alsa-util.c:   avail_min    : 15502
D: [pulseaudio] alsa-util.c:   period_event : 0
D: [pulseaudio] alsa-util.c:   start_threshold  : -1
D: [pulseaudio] alsa-util.c:   stop_threshold   : 4611686018427387904
D: [pulseaudio] alsa-util.c:   silence_threshold: 0
D: [pulseaudio] alsa-util.c:   silence_size : 0
D: [pulseaudio] alsa-util.c:   boundary     : 4611686018427387904
D: [pulseaudio] alsa-util.c:   appl_ptr     : 0
D: [pulseaudio] alsa-util.c:   hw_ptr       : 0
D: [alsa-source-VT1705 Analog] alsa-source.c: Thread starting up
D: [pulseaudio] alsa-source.c: Requested volume: front-left: 32847 /  50% /
-18,00 dB,   front-right: 32847 /  50% / -18,00 dB
D: [pulseaudio] alsa-source.c: Got hardware volume: front-left: 29843 /  46% /
-20,50 dB,   front-right: 29843 /  46% / -20,50 dB
D: [pulseaudio] alsa-source.c: Calculated software volume: front-left: 72133 /
110% / 2,50 dB,   front-right: 72133 / 110% / 2,50 dB (accurate-enough=no)
D: [pulseaudio] alsa-source.c: Written HW volume did not match with the
request: front-left: 32847 /  50% / -18,00 dB,   front-right: 32847 /  50% /
-18,00 dB (request) != front-left: 29843 /  46% / -20,50 dB,   front-right:
29843 /  46% / -20,50 dB


you have to provide output of alsa-info.sh


 how many steps in capture volume and mic boost ?

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