Re: AC3 passthrough on Audigy

[James Courtier-Dutton <James@superbug.demon.co.uk>]

p z oooo wrote:
> Hi,
> 
> This is taken from oss driver. It is not tested (I don't own 
> receiver). Can someone try it, maybe this works, I don't know.
> 
> Audigy.conf - copy this to /usr/share/alsa/cards/ and overwrite old 
> one (make backup).
> 
> emu10k1.h.patch - patch for file alsa-driver/alsa-
> kernel/include/emu10k1.h
> 
> emufx.c.patch - patch for file alsa-driver/alsa-
> kernel/pci/emu10k1/emufx.c
> 
> If this doesn't work try to comment out lines
> A_OP(icode, &ptr, iSKIP, A_GPR_COND, A_GPR_COND, A_GPR(gpr - 2), 
> A_C_00000001);
> A_OP(icode, &ptr, iACC3, A_GPR(tmp + 2), A_C_00000000, A_C_00010000, 
> A_GPR(tmp + 2));
> 
> And if this doesn't work too, then delete this mail.
> 
> Peter Zubaj
> 
I tried this on an Audigy2. It does not work.
The non-audio bits on the SPDIF are set correctly, and Audio data is 
being sent out from the port, so for PCM data it is fine. For non-audio 
AC3 data, it fails. Probably due to the samples getting modified in some 
way as they pass thru the DSP.

Cheers
James




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