Subject: Re: [linux-audio-user] low-latncy patch questions
From: Eric Dantan Rzewnicki (rzewnickie_AT_rfa.org)
Date: Mon Apr 15 2002 - 21:18:04 EEST
Hey Nathaniel,
My understanding is that alsa drivers do need to be re-compiled for
each new kernel compilation.
You probably now this, but just to be sure, the ll patch adds an option
in your kernel config that needs to be turned on in order for it to
actually get built.
-Eric Rz.
On Mon, Apr 15, 2002 at 06:54:11PM +0100, Nathaniel Virgo wrote:
>
> Hi people,
>
> I've just installed the ll kernel patch (the SuSE version for kernel
> 2.4.10). I'm using ttrk to play back processed drum loops with csound, but
> the timing still seems a little wonky - I can't tell any difference from
> how it was before. So my questions are:
>
> Is there anything special I have to do to make apps use the low-latency
> stuff, and is there any way I can tell if it's working properly?
>
> Also, can I expect the patch to improve realtime audio performance with
> csound, or is it just to sort out midi timing jitter?
>
> Or is it the case that apps have to be specially written to use the
> patch, and ttrk and/or csound aren't?
>
> Any help/suggestions/vague clues would be very highly appreciated.
>
> When I was doing 'make modules_install' I got a load of depmod errors
> (unresolved symbols) in the alsa modules, but it seems to still be using
> the old ones (which are version 0.9.0beta9, installed from a binary rpm) -
> do I need to recompile the alsa stuff properly for the low-latency thing to
> work?
>
> thanks,
> Nathaniel.
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