Playing Multiple Audio streams

Playing Multiple Audio streams

[Jeff McBride]

Hello,


Are there any good ways to play several audio sources simultaneously? If
an application wants to be playing say, several wave files overtop of each
other, does it have to mix them itself and then play one stream. Or are
there other drives, or possibly a daemon of some kind to do it? 

And how about multiple applications that are unaware of each other playing
at the same time? 


Thanks for any help,

Jeff

Re: Playing Multiple Audio streams

[Thomas Zimmerman]

Jeff McBride wrote:
> 
> Hello,
> 
> Are there any good ways to play several audio sources simultaneously? If
> an application wants to be playing say, several wave files overtop of each
> other, does it have to mix them itself and then play one stream. Or are
> there other drives, or possibly a daemon of some kind to do it?
> 
> And how about multiple applications that are unaware of each other playing
> at the same time?
> 
> Thanks for any help,
> 
> Jeff

EsounD deamon is what you are looking for. However, the apps need to
know to use ESD to play...

Re: Playing Multiple Audio streams

[Eric Mitchell]

Thomas Zimmerman wrote:
> 
> Jeff McBride wrote:
> >
> > Hello,
> >
> > Are there any good ways to play several audio sources simultaneously? If
> > an application wants to be playing say, several wave files overtop of each
> > other, does it have to mix them itself and then play one stream. Or are
> > there other drives, or possibly a daemon of some kind to do it?
> >
> > And how about multiple applications that are unaware of each other playing
> > at the same time?
> >
> > Thanks for any help,
> >
> > Jeff
> 
> EsounD deamon is what you are looking for. However, the apps need to
> know to use ESD to play...

Or, as long as the application doesn't memory map the 
sound card DMA buffers (like quake), you can run:

	esddsp program args

to reroute audio device calls to the esd server.  For example:

	esddsp realplay somefile.rm
	esddsp vmware winamp.exe somefile.mp3

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Re: Playing Multiple Audio streams

[lantz moore]

Jeff McBride <trep@trep.dhs.org> writes:

> Are there any good ways to play several audio sources simultaneously? If
> an application wants to be playing say, several wave files overtop of each
> other, does it have to mix them itself and then play one stream. Or are
> there other drives, or possibly a daemon of some kind to do it? 

rplay[1], nas[2], and ESounD[3] can all do this very well.

> And how about multiple applications that are unaware of each other playing
> at the same time? 

rplay and ESoundD both have ways of tricking an application into playing
audio via sound servers.  i know that both rplay and esd are under
development, however, i'm not sure about nas.

-l

[1] http://rplay.doit.org
[2] ftp://ftp.x.org/contrib/audio/nas/
[3] http://www.tux.org/~ricdude/EsounD.html