AWE64 Duplex not working with 2.4.17

AWE64 Duplex not working with 2.4.17

[rdicaire]

I have installed an SB AWE 64, kernel is 2.4.17, audio works fine, but I
cannot play
simultaneous multpile wav or mp3 files, errors reported that something
else has the device open already.

Here's what syslog reports when the modules are loaded:

Dec 29 13:21:13 ws kernel: Soundblaster audio driver Copyright (C) by
Hannu Savolainen 1993-1996 
Dec 29 13:21:14 ws kernel: sb: Creative SB AWE64  PnP detected 
Dec 29 13:21:14 ws kernel: sb: ISAPnP reports 'Creative SB AWE64  PnP'
at i/o 0x220, irq 5, dma 1, 5 
Dec 29 13:21:14 ws kernel: SB 4.16 detected OK (220) 
Dec 29 13:21:14 ws kernel: sb: 1 Soundblaster PnP card(s) found. 


Is there some module option to enable duplex operation?

Please CC: me on replies as I am not on this mailing list, thanks.

Re: AWE64 Duplex not working with 2.4.17

[ertzog]

It is impossible, as I know. For this use either esd (from Enlightenment),
either the same sound daemon from KDE. First seems to be better, because
more supported.

Best regards.

On Sat, 29 Dec 2001 rdicaire@ardynet.com wrote:

> I have installed an SB AWE 64, kernel is 2.4.17, audio works fine, but I
> cannot play
> simultaneous multpile wav or mp3 files, errors reported that something
> else has the device open already.

Re: AWE64 Duplex not working with 2.4.17

[Lionel Bouton]

rdicaire@ardynet.com wrote:

> I have installed an SB AWE 64, kernel is 2.4.17, audio works fine, but I
> cannot play
> simultaneous multpile wav or mp3 files, errors reported that something
> else has the device open already.
> 


This is an hardware limitation. AWE series don't support multiple PCM 
streams.
So mixing multiple PCM streams must be done in software. Use either esd, 
artsd, ...

You could imagine a driver based software mixing but :
- it would make drivers far more complex -> more bug-prone,
- it may pose performance/feasability problems when your apps need 
accurate timings (Video/audio sync for example).

LB.