On Sun, 2002-02-10 at 04:10, G. Major wrote:
> 
> I have the ltsp "almost completely working" at this point except for sound 
> on
> the workstation. The server is working fine, including OSS sound and I don't
> want to break that. I am not using "local apps" on the workstation. Although 
> I
> may choose to do this at some point, I am hoping that it is not necessary to 
> get
> sound working. I need to use OSS sound from the workstation in order for
> certain applications to function properly. I am using the "cmpci" sound 
> module.

You don't need to have sound working on the server to play mp3s etc. out
of the clients. Crudely speaking, when a user logs on to the server from
a client, all they need to do is to run a program on the server which
can read the files and then fire the output to the right client. 

I know xmms works with the eSound plug in (I'm writing this on a
diskless workstation playing some lovely Enya tracks as I write) - I've
had problems with the OSS plug in with multiple clients.

You don't need local apps on the client. However, you do need sound
enabled. It's also useful to have speakers with physical volume controls
on them - there is a per client volume control set on the server in
later versions of esound, but it's a bit crude. If you want full control
of the sound on the client, then you need to install a local app to do
it.

> I am using the "aRts Driver (libartsout.so) for the server XMMS output 
> plugin. I
> also have a number of entries in my server "mocules.conf" file that relate 
> to
> sound, including an "OSS/Free" portion. I have no problems with sound on the 
> server.
> I can play wav files from the workstation by running "esdplay" but otherwise 
> no
> sound  comes from the workstation's speakers. If the same user is logged 
> into
> the server and workstation, I get sound from the server's speakers that is
> generated from the workstation If different users are logged into the 
> workstation
> and server, I just get an error about the "dsp" upon booting the 
> workstation. I
> can not get any sound generated from the workstation.

As I understand it, the OSS driver sends its output to /dev/dsp - and
only one user can access /dev/dsp at a time. The eSound driver sends its
output via port 16001 to the appropriate client workstation.

> Does anyone know how to accomplish this (OSS workstation sound without 
> causing
> any server problems)?

The esound software from K12LTSP is next to impossible to find on the
web, but it works. I keep a link to it from the 'software' page on
http://uk.homelinux.org.

Good luck - John


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