15 Apr
2014
15 Apr
'14
5:28 a.m.
I read about zita-ajbridge:
http://kokkinizita.linuxaudio.org/linuxaudio/zita-ajbridge-doc/quickguide.h…
Set Jack to use its dummy driver, and then (in background) run zita-a2j for output and/or
zita-j2a for input, and then ignore the 'system' input and output ports and use
the Zita ports. I went from 5.33ms to 1.33ms latency, and from occasional xruns to zero,
and even with that my jackd usage percent is cut in half! Shocking. And that's three
Yoshimis simultaneously. :-) I am tempted to giggle, but I am happier than that!!!
The only partial catch was MIDI; without the ALSA driver for Jack, one does not have Jack
MIDI :-) Unless, of course, one uses a2jmidid, so that's what I'm doing. With
such a small Jack period, the extra period for a2jmidid is not an issue.
Just had to report, and congratulate, and thank, everyone involved!!!!!
Jonathan E. Brickman
Ponderworthy Music | jeb(a)ponderworthy.com | (785)233-9977 | http://ponderworthy.com
15 Apr
15 Apr
6:18 a.m.
On Tue, Apr 15, 2014 at 6:27 AM, Jonathan E. Brickman
<jeb(a)ponderworthy.com>wrote;wrote:
I read about zita-ajbridge:
[...]
The only partial catch was MIDI; without the ALSA
driver for Jack, one
does not have Jack MIDI :-) Unless, of course, one uses a2jmidid, so
that's what I'm doing. With such a small Jack period, the extra period for
a2jmidid is not an issue.
the latest version of JACK 1 has the zita-a2j/j2a tools available as
builtin clients, a2jmidi available as a builtin "slave" driver, and reduces
MIDI latency even further, just FYI.
2:22 p.m.
Paul, I should have guessed :-) Any idea how best to identify it under Arch Linux --
perhaps the 'git' version of jack2?
J.E.B.
---- On Mon, 14 Apr 2014 21:17:58 -0700 Paul
Davis&lt;paul(a)linuxaudiosystems.com&gt; wrote ----
On Tue, Apr 15, 2014 at 6:27 AM, Jonathan E. Brickman &lt;jeb(a)ponderworthy.com&gt;
wrote:
I read about zita-ajbridge:
[...]
The only partial catch was MIDI; without the ALSA driver for Jack, one does not have Jack
MIDI :-) Unless, of course, one uses a2jmidid, so that's what I'm doing. With
such a small Jack period, the extra period for a2jmidid is not an issue.
the latest version of JACK 1 has the zita-a2j/j2a tools available as builtin clients,
a2jmidi available as a builtin "slave" driver, and reduces MIDI latency even
further, just FYI.
Jonathan E. Brickman
Ponderworthy Music | jeb(a)ponderworthy.com | (785)233-9977 | http://ponderworthy.com
2:28 p.m.
On Tue, Apr 15, 2014 at 05:21:35AM -0700, Jonathan E. Brickman wrote:
Paul, I should have guessed :-) Any idea how best to
identify it under Arch Linux -- perhaps the 'git' version of jack2?
The standard Arch Jack package. This is Jack1 0.124.1, Jack2 doesn't have
zita-x2y built-in.
Ciao,
--
FA
A world of exhaustive, reliable metadata would be an utopia.
It's also a pipe-dream, founded on self-delusion, nerd hubris
and hysterically inflated market opportunities. (Cory Doctorow)
2:51 p.m.
Wow, Jack1!
http://jackaudio.org/node/67
J.E.B.
---- On Mon, 14 Apr 2014 21:17:58 -0700 Paul Davis
&lt;paul(a)linuxaudiosystems.com&gt; wrote ----
On Tue, Apr 15, 2014 at 6:27 AM, Jonathan E. Brickman &lt;jeb(a)ponderworthy.com&gt;
wrote:
I read about zita-ajbridge:
[...]
The only partial catch was MIDI; without the ALSA driver for Jack, one does not have Jack
MIDI :-) Unless, of course, one uses a2jmidid, so that's what I'm doing. With
such a small Jack period, the extra period for a2jmidid is not an issue.
the latest version of JACK 1 has the zita-a2j/j2a tools available as builtin clients,
a2jmidi available as a builtin "slave" driver, and reduces MIDI latency even
further, just FYI.
Jonathan E. Brickman
Ponderworthy Music | jeb(a)ponderworthy.com | (785)233-9977 | http://ponderworthy.com
1:09 p.m.
On Mon, Apr 14, 2014 at 08:27:13PM -0700, Jonathan E. Brickman wrote:
I read about zita-ajbridge:
http://kokkinizita.linuxaudio.org/linuxaudio/zita-ajbridge-doc/quickguide.h…
Set Jack to use its dummy driver, and then (in background) run zita-a2j
for output and/or zita-j2a for input, and then ignore the 'system' input
and output ports and use the Zita ports. I went from 5.33ms to 1.33ms latency,
and from occasional xruns to zero, and even with that my jackd usage percent
is cut in half! Shocking.
Hmm... What parameters are you using for Jack and zita-x2y ?
I have some difficulty in believing that 1.33 ms latency.
Ciao,
--
FA
A world of exhaustive, reliable metadata would be an utopia.
It's also a pipe-dream, founded on self-delusion, nerd hubris
and hysterically inflated market opportunities. (Cory Doctorow)
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6 comments
4 participants
participants (4)
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Fons Adriaensen -
Harry van Haaren -
Jonathan E. Brickman -
Paul Davis