12 Feb
2005
12 Feb
'05
4 p.m.
Hi all,
I have little idea about audio terms, and the following always intrigues me:
When I open KMix, the KDE Mixer, I can change the volume of both
"Master" and "PCM" which both change the music volume. I can also
control the volume of "AC97" but that has no effect while playing music.
Can someone please explain what are those settings and what are the
differences between them.
This is my sound card:
[xxx@localhost xxx]$ lspci | grep -i audio
00:1f.5 Multimedia audio controller: Intel Corp. 82801DB/DBL/DBM
(ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 03)
Regards,
Hillel.
12 Feb
12 Feb
7:25 p.m.
When I open KMix, the KDE Mixer, I can change the
volume of
both "Master" and "PCM" which both change the music volume.
PCM controls the volume of all sound generating programs,
which means which volume is put *to* the mixer.
Master controls at which level the audio data *in* the mixer
leaves the mixer to the outputs.
Therefore, PCM controls the in gain, while master controls the
out gain.
Besides PCM, there are other sources like CD and so on. So,
the mixer inputs allow you to adjust the mixing of the
different sources, while master sets the volume of the
general output.
I can also control the volume of "AC97" but
that has no
effect while playing music.
I didn't ever need this, so I do not know for what it is :) .
Best regards
ce
7253
days inactive
7253
days old
linux-audio-user@lists.linuxaudio.org
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participants (2)
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Christoph Eckert -
Hillel