On Fri, Sep 07, 2007 at 10:26:34PM +0200, Jochen Fabricius wrote:
> Hi, 
> 
> > I am running OpenBSD 4.1 with a SoundBlaster PCI 128 audio card.
> > This card uses the "eap" driver.
> 
> I am not sure if this card supports full duplex. Check
> 
> audioctl properties
> 
> for the term "full_duplex". You will need this feature. 

um, he specifically said he does not want to record :P

> > Does anyone have a recommended way and/or application that
> > could directly play out the raw audio that is coming into card?
> > Is this possible?
> 
> I tried some time ago with audacity, but it didn't work.

yes, currently (as has always been the case) applications that use
the OSS audio interface can't do full-duplex.

this will likely change in the near future.

> You can code this for 
> yourself directly in C, it's not difficult, ~100 lines of code max. 

src/regress/sys/dev/audio_rw/audiotest_rw.c is also IMO a useful
reference for reading/writing audio, but I am prejudice :)

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