Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: pulseaudio (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1311525
Title:
I've been encountering this on an Asus Z97 Extreme6 under Kubuntu 16.04.
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Title:
Can only use half the sound range without overdriving sound
To
If pulseaudio ignore dB scale, do this mean it use full volume range ?
Do PCM Playback volume remain at 0dB all the time ?
Yes, it then uses the complete Master range, indicated as: -46.50 dB (0
%) to 0 dB (100%). PCM stays at 0 dB (56 %) while doing so.
do distortion occur when your
take a look at alc850 datasheet or Intel AC97 2.x specificatiom
6.3.5 Analog Mixer Input Gain Registers (Index 0Ch - 18h)
all mixer inputs have +12dB gain (e.g. phone, Mic, line in, CD, Video,
Auxiliary and PCM OUT)
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http://www.realtek.com.tw/products/productsview.aspx?langid=1pfid=31level=5conn=4prodid=59
** Package changed: alsa-driver (Ubuntu) = pulseaudio (Ubuntu)
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control.14 {
iface MIXER
name 'Phone Playback Volume'
value 0
comment {
access 'read write'
type INTEGER
count 1
range '0 - 31'
how about remove pcm playback volume from
http://cgit.freedesktop.org/pulseaudio/pulseaudio/tree/src/modules/alsa/mixer/paths
/analog-output.conf.common
or
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[Element PCM]
switch = on
-volume = merge
override-map.1 = all
override-map.2 = all-left,all-righ
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Title:
Can only use half the sound range
https://bugzilla.kernel.org/show_bug.cgi?id=73851
there are sound card which dB range does not contain 0dB
do you mean it is not a bug of pulseaudio should show 0dB in the slider ?
** Bug watch added: Linux Kernel Bug Tracker #73851
http://bugzilla.kernel.org/show_bug.cgi?id=73851
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Thanks Raymond for looking into this.
If I understand correctly, the specification defines that 100% equals
12db, so ALSA is not at fault.
For the range, I can turn down the PCM switch all the way to -34.5db and
still have sound. So the range is pretty wide, same for Master.
It's just how far
0:64 = 0808
0:66 = 0808
MX64 surround dac volume
MX66 center/lfe dac volume
alc850 seem have two vendor specific registers -34.5dB to +12dB GAIN ,
the driver seem only expose those standard registers
the standard registers have dB range -94.5dB to 0dB
MX36 CENTER/LFE Master volume
MX38
do you mean pulseaudio did not save an restore the non distorted volume
setting and always switch to 100% after reboot ?
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Title:
Can only use
I've removed the ignore_dB=1 to test, and Pulse saves the volume across
reboots for me.
But I tend to use the volume buttons (both the indicator in the taskbar
and on the keyboard) quite often (e.g. for music with different gains)
so before disabling PCM, I've found it easy to accidentally return
As a workaround I've disabled Pulse's control over PCM by adding
load-module module-udev-detect ignore_dB=1
to /etc/pulse/default.pa
volume: 0: 63% 1: 63%
0: -12,00 dB 1: -12,00 dB
balance 0,00
base volume: 63%
-12,00 dB
If
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