[linux-audio-user] aplay, plughw, alsamixer question

[Gustavo Zamorano S.]

hello!

I'm finishing up installing Alsa drivers on my Red Hat 9 partition.
RH 9 recognized my VIA82C sound card.  But I decided to switch to Alsa 
drivers.  I  downloaded last release (9.5).
After installing alsa drivers there was a noise after a sound was 
played.  On the sound server setup I selected:
Use custom sampling rate: 48000
and:
Other custom options:
-a oss


After compiling the drivers, be sure to run snddevices.  If you miss it, 
then amixer and alsamixer will not run.
Then, I compiled and installed the alsa-libs and then alsa-utils.

I run alsamixer several times to change PCM and Master controls to 
different levels to test aplay /usr/share/sound/startup3.wav.  Aplay 
played sounds at volumn levels controlled by alsamixer.

So, I think you missed to run snddevices under the alsa-drivers directory.

I hope this will help you.
The same Alsa drivers are running very well on my RHat 8.0 partition.

GZS


fpirrone wrote:
> Mark Knecht wrote:
> 
>> No responses here also?????
>>
>>  
>>
>>> -----Original Message-----
>>> From: linux-audio-user-admin at music.columbia.edu
>>> [mailto:linux-audio-user-admin at music.columbia.edu]On Behalf Of Mark
>>> Knecht
>>> Sent: Friday, July 25, 2003 7:42 AM
>>> To: Linux-Audio-User
>>> Subject: [linux-audio-user] aplay, plughw, alsamixer question
>>>
>>>
>>> Hi,
>>>   Hi. I asked this question on Alsa-Dev yesterday, but 17 hours later 
>>> got
>>> no answers. Excuse me to those that subscribe to both lists.
>>>
>>>   This info is to help me do more debug work on a new HDSP 9652 driver
>>> version that I am helping to test.
>>>
>>>   Should the volume levels I hear when using the command
>>>
>>> aplay -Dplughw:0 -r 44100 data/wave/seque~10.wav
>>>
>>> be controlled by alsamixer?
>>>
>>> The volumes for alsaplayer are being controlled by alsamixer, but
>>> this aplay
>>> command is not, at least right now on a new driver I'm using.
>>>
>>>   Also, on a multichannel card, how do I direct the above aplay
>>> command to
>>> a specific channel? I am finding that with this new driver the audio is
>>> appearing on ALL channels on the card, even for a mono wave file. I 
>>> think
>>> this is a bug, but I'm not sure.
>>>
>>>   If there's an explanation fit for a simpleton like me about the
>>> difference between plughw and hw and when to use one vs. the other, 
>>> please
>>> point me there so I can learn. I have read a bit on the Alsa site about
>>> plughw talking directly to the kernel, but beyond that I have not
>>> discovered
>>> any documentation yet.
>>>
>>>   Thanks in advance.
>>>
>>> Cheers,
>>> Mark
>>>
> Mark,
> 
> I don't have any experiences with your hardware and didn't think my 
> reply would be of much use to you, but running the exact command you 
> post on my cs4236 system produces sound that is under control of 
> alsamixer, as does -Dhw:0, so that suggests to me that aplay is directly 
> affected by the settings in the mixer. 
> Now, some cards do not have a mixer so they should not behave this way, 
> as I assume would be the case if there were something wrong with the 
> driver for a card that does have a mixer.  In either event I would not 
> expect to see controls in amixer or the gamix graphical interface.  If 
> you see them and they have no effect that sounds like a malfunction.
> 
> Couldn't find any answer to your channel question.  My system does not 
> seem to provide a relevant option to explore this further.  I fooled 
> around with -c and -I options but could draw no useful conclusions.
> 
> Frank
> 
> 


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       .-.                    Gustavo Zamorano S.
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