14 Jun
2011
14 Jun
'11
9:11 a.m.
Hey all,
So the continuing saga is this: still no luck getting Pianoteq with JACK to
equal or spank with superiority the performance of PianoTeq w/ALSA alone on
my system.....
I found the following information: the info from the /proc/asound output
that Paul asked me to check out confirmed that at comparable settings, JACK
choked where ALSA smoked. I had ALSA down to a period of 64 and 3
periods/buffer (hardware bufsize of 192) at a sample rate of 48000. The same
setting of jackd ('jackd -dalsa -dhw:0,0 -r48000 -p64 -n3 -S') didn't agree
with Pianoteq....
So...here's my dilemma. I have a live show coming up where I'd prefer to use
the superior harpsichord sound of Pianoteq, but I don't want to risk a
lock-up or xruns or worse in a live concert. So I would have to use
ALSA...BUT....I also need to switch to playing a live kalimba through some
Csound effects right after playing a harpsichord, and Pianoteq under ALSA
will not stand for another app opening and sharing the soundcard like JACK
will allow (ALSA will block I/O).
So what can I do?
Best,
AKJ
On Sun, Jun 12, 2011 at 2:40 AM, Aaron Krister Johnson
<aaron(a)akjmusic.com>wrote;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....
Best,
AKJ
--
Aaron Krister Johnson
http://www.akjmusic.com
http://www.untwelve.org
--
Aaron Krister Johnson
http://www.akjmusic.com
http://www.untwelve.org