30 Sep
2003
30 Sep
'03
4:41 p.m.
From a few days I'm trying to use my pc as a
synth to improve the
sounds of my keyboard.
I've installed low-latency kernel, alsa, jack, muse, rosergarden... etc
from planet ccrma.
Cool!
I can't start jack with the period (-p) under 512 frames (with my SB
Audigy) and a number of periods (-n) under 2. That mean that I have a
latency of at least 23.2 msec (from qjackctl).
this *may* be a limitation of the Audigy. I have one, but it's in a windows
box so I cannot check for you. I remember it was pretty high though compared
to my RME cards.
Does this latency affects the sound I hear when I play my MIDI keyboard
with a synth (for example muse)?
Does anyone knows if the Audigy (player) can go under 512 of the -p
parametre in jack?
Yep. MIDI in latency + soft synth latency + Jack output latency
With windows & cubase VST I can get a latency of about 10 ms that it's
good for my purpose, while 20 msec
Can I play directly in to alsa to reduce the latency (jump the jack
latency)?
With soft synths that support it. Timidity I think supports this. Maybe AMS,
but I'm not sure. Some of the older ones like Bristol, etc., before Jack
came along.
I think that the only way to get the so claimed 2.9 msec latency is to
reduce to 64 the numbers of frames, but I don't know if is it possible
with my sound card and if my actual limit of 512 is due misconfiguration
or is the real limit for the Audigy.
I do not remember being able to run this card that low. I can do this with
my RME cards.
Not a lot of info. All I have to give. Sorry.
Good luck,
Mark