Re: emu10k1 latency / capture period

[Takashi Iwai <tiwai@suse.de>]

At Thu, 17 Jun 2004 19:26:46 -0400,
Paul Davis wrote:
> 
> >To reiterate the situation:  currently the ASIO drivers for this card 
> >provide an order of magnitude
> >better latency than the ALSA driver.  I am constantly hearing claims 
> >that ALSA is superior to ASIO,
> >but no one can tell me why the ALSA drivers for this *very* common 
> >device provide 5-10x worse latency
> >than the ASIO drivers.
> >
> >As I see it, this is a glaring deficiency.
> 
> as a disinterested observer, i would just note that by my
> understanding, Creative have not released all the necessary
> programming information on the emu10k1. i suspect that whatever is
> necessary to get the period size down to the levels the ASIO driver(s)
> are using is in the information that they will not release without an
> NDA. 

It might be.  But my guess is that ASIO uses the playback interrupt
for capture, too.


Takashi


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