[LAU] Jack vs. Alsa, PianoTeq demo: Alsa wins!

[rosea.grammostola]

On 06/12/2011 09:40 AM, Aaron Krister Johnson wrote:
> Hi all--
>
> I'm wondering if anyone else has experienced this:
>
> I'm considering purchasing PianoTeq, but I wanted to try the demo. It
> seems to work better with just the alsa driver than it does with jack, a
> reversal of the usual situation.
>
> I tested this several times by playing fast glissandi on the default
> piano preset. Each time, my little EEE-PC netbook under jack choked with
> xruns and a brief silence while PianoTeq 'reset' itself, but Alsa alone
> chugged away with no xruns unless there was an extreme amount of load....
>
> I'm wondering if anyone can comment on this. It seems odd, especially
> since the jack developers claim jack adds no latency by itself to the
> picture in any situation---so, do we have a situation where the code is
> better written for the alsa driver than for jackd? It seems we do, in
> this case....

Which Jack version? Which kernel? Which OS?

Using Pianoteq myself, runs like a charm, with JACK, but it asks for 
pretty some CPU...

\r