Re: s/pdif controls

[Takashi Iwai <tiwai@suse.de>]

At Sat, 8 Mar 2003 10:00:20 -0500,
Paul Davis wrote:
> 
> how are users supposed to set various s/pdif bits?
> 
> the existing control formats involve massive bitfields that are
> totally impenetrenable to almost everyone.
> 
> what is the strategy here? if someone wants to turn the pro/consumer
> bit on/off, what are they supposed to do?

a good question - there has not been much discussions there.
the iec958 status bits are passed usually through AESx arguments of
iec958 (aka spdif) pcm interface.  and i think it's a good way,
because it's general and applicable to different cards in a uniform
way.

so far, almost only AC3-passthru was the case which needs to change
such a configuration, and the status bits are likely known for such.
so, there was no big complans about this.  but, surely the way above
is for end-users.

well, we'll need a kind of iec958-status-bit-composer, which is
implemented on envy24control.  but i believe it should be a user-land
solution, anyway.


Takashi


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