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On 07/06/2010 10:38 AM, Bill Davidsen wrote:
> Rick Sewill wrote:
>> On 07/05/2010 10:23 PM, Rick Sewill wrote:
> .
>> I am wondering if OSS is enabled on your system.
>>
>> Please look for things related to OSS in
>> /etc/modprobe.conf (if it exists)
>> and /etc/modprobe.d
>> Please make sure the line in /etc/modprobe.d/dist-oss.conf is
>> commented out.
>>
>> Please do, lsmod | grep snd
>> Please make sure there is nothing like snd-pcm-oss or snd-seq-oss
>> installed.
>>
> I think you have this totally backward. There are many applications which use
> the /dev/dsp* devices, and which will produce no sound unless they are present.
> In fact, I think the majority of older hardware does not have support for sound
> other than oss. As I look at my newest TV card it has stuff in /dev/dvb, while
> the other 4-5 cards which have been happily in use do not.
>
> To test (as root):
> modprobe -v snd-pcm-oss
> {test applications for sound here}
>
> A lot of people have functional old hardware they can't replace, for financial
> or technical reasons. That's why there is oss support, to support the hardware
> which needs it.
>
This is something I didn't know. As I said, audio still confuses me.
Our goal should be to help the original poster.
In this regard, this new information raises a number of questions.
I am hoping someone will say there is a wiki or web page that answers
these questions (and questions I didn't think of).
The questions, I hope, which might be of use to the original poster are
as follows:
1) for what hardware should one use OSS as opposed to Pulse Audio.
I did a quick internet search, but failed to find such a list.
I am hoping others can help.
This question is to help the original poster decide if they should
switch to OSS and see if it works.
2) How does one tell if OSS is being used?
I assume, if I do lsmod | grep oss, I will see if the OSS modules
are being loaded.
3) How does one switch from Pulse Audio to OSS?
I assume one needs to edit files in /etc/modules.d/*.conf
or /etc/modules.conf.
Files to be edited might include dist-oss.conf and blacklist.conf
and others? Am I right?
Are there other files one needs to edit?
Are there any rpms one needs to install?
Are there any rpms one needs to remove?
Are there any application configuration changes one needs to make?
I assume applications can be configured to use the OSS api, as well
as the ALSA api and/or Pulse Audio API.
4) How does one switch from OSS back to Pulse Audio?
Is the answer to this the inverse of the answer to question 3?
I.e., edit files /etc/modules.d/*.conf or /etc/modules.conf
Install certain rpms?
Remove certain rpms?
5) is there a web page that describes the tools one uses when using OSS?
Are these the tools: http://www.opensound.com/ossapps.html#mixer
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