Re: Re: [Alsa-user] [RME Hammerfall] Using multiple channels

[<je...@se...>]

What do i have to do, to play just 1 wav file on 1 channel (i mean: not 8 at the same time). That would solve all my problems ;). If i play something now, it uses all the channels.

I use the .asoundrc from http://alsa.opensrc.org/index.php?page=RME+Hammerfall+.asoundrc in /root/.asoundrc and i have aplay installed, to test everything.

I just want to play songs _after_ eachother, not more then 1 song at the same time.

I played with something like 'aplay --separate-channels --channels=1 -t wav bla.wav', but it's not right (ofcourse?)

Thanks a lot!



> On Thu, 18 Jul 2002, Jesper - Servicez.org wrote:
> 
> > Guys/Lady's,
> >
> > My boss gave me a RME952 Hammerfall to use it in Linux, i asked specificly for
> > that card, because of the great stories i found on the alsa-website.
> >
> > Now i'm busy with it for 2 weeks, and it still doesn't work the way i want it.
> >
> > I only want to play, on multiple channels!
> >
> > What i did:
> >
> > - I compiled all alsa-packages, compiled the 'driver' package with oss support
> > and support for my card
> > - Make install, reboot, etc
> >
> > When i load my driver, it says nothing at all so it seems to be okay..
> >
> > When i try to listen now, i hear my music (tits.mp3, but that doesn't matter
> > :-), but it plays over all (8 in our situation) channels we've connected.
> 
> That's right. Stereo is expanded to all channels.
> 
> > What i want, is playing music and tell mpg123 (for example) the channel it
> > should play on.
> 
> It's not as easy as it looks. RME cards are designed especially for HDR
> operations. All channels are running in sync and simultaneously. So, if
> you want to share this device with more applications, you need to create
> an arbiter which multiplexes all sources. Timing is problematic in this
> case (you need to place starting samples into running buffer, so we
> cannot guarantee that you'll have all samples on output, or - using some
> ahead - you'll have more samples on output). We have a solution, but we
> need more time to debug / develop some robust code.
> 
> Anyway, I don't see your real goal. Why you need to have 22 hammerfalls?
> Perhaps some consumer hardware might solve your problem.
> 
> > When it works; can anybody tell me how to donate some money to the
> > alsa-project?
> 
> Ask me privately, when you are satisfied with our code.
> 
>       Jaroslav
> 
> -----
> Jaroslav Kysela <pe...@su...>
> Linux Kernel Sound Maintainer
> ALSA Project  http://www.alsa-project.org
> SuSE Linux    http://www.suse.com
> 
> 
> 
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Met vriendelijke groet,

Jesper - Servicez.org Hosting