<br><br><div class="gmail_quote">On Sun, Mar 8, 2009 at 2:42 PM, Asmo Koskinen <span dir="ltr"><<a href="mailto:asmo.koskinen@arkki.info">asmo.koskinen@arkki.info</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
alex stone kirjoitti:<br>
<div class="im"><br>
> Asmo,<br>
> do you need capture ports?<br>
<br>
</div>I'm no expert here with jackd - do you mean recording - yes, I need that<br>
feature, I need record voice and instruments via jackd/Ardour2.<br>
<div class="im"><br>
> And would 3 periods work better than 2?<br>
<br>
</div>I just try to clone my working Hardy environment on Jaunty, I use these<br>
options on Hardy.<br>
<br>
"studio@ubuntu-studio:~$ cat .jackdrc<br>
<div class="im">/usr/bin/jackd -R -dalsa -dhw:0 -r44100 -p256 -n2<br>
</div>studio@ubuntu-studio:~$"<br>
<br>
<a href="http://wiki.ubuntu-fi.org/Ubuntu_Studio#head-d170ac730326977ff551a2b83fca37c1a9c53de9" target="_blank">http://wiki.ubuntu-fi.org/Ubuntu_Studio#head-d170ac730326977ff551a2b83fca37c1a9c53de9</a><br>
<div><div></div><div class="h5"><br>
Best Regards Asmo Koskinen.<br>
<br>
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<br>Asmo <br></div></div><br>if you change -n2 to -n3 and try that, it may help. It depends on how low you want latency to go, but i'm one who sometimes thinks the 'obession' with ultra low latency is a bit self defeating. I sat in an orchestra for some time (woodwinds), and experienced quite a bit more than 5ms latency between me and the 1st violins. One learns to compensate. Maybe with 10-15ms latency, and a bit of 'instinctive user compensation' the end result may be better than one would think.<br>
<br>Having said this, on 64bit Hardy UBStudio, i'm writing with an average of 8-10ms (non-live. I write in the box, so to speak), and on my new Debian 5 32bit build, with a self baked RT kernel (2.6.26-rt11), i'm getting 5-10ms dependent on task, comfortably, and importantly, with all day everyday stability.<br>
<br>Previous testing, and i say this from a strictly personal perspective, had Gutsy UBStudio yielding the best results, with latency (tested for the fun of trying) as low as 3ms (stable).<br><br>My soundcard is an Maudio Delta 44, with the ice1712 Alsa module.<br>
<br>I don't use oss at all, and turned it off in the debian kernel build.<br><br>I use raw as the midi driver, and a2jmidid for any cross alsa/jack midi requirements.<br><br><br>limits are:<br><br>audio nice -19<br>rtprio 99<br>
memlock unlimited<br><br>pidirq for the soundcard is set at a priority of 92<br>jack priority is set to 89<br><br>the computer is an AMD dualCore x64 5600+ with 4gb of ram.<br>3 HD, being 1 system, and two dedicated sample drives. <br>
Additional external drive for backup.<br><br>All 7200, 32mb cache.<br><br><br>Maybe something you see in this might help.<br>
<br>*Note* In the settings you provided for jack, i notice you don't have a defined priority number for realtime, just an -R flag. Is there a reason for this?<br><br>Alex.<br><br clear="all"><br>-- <br>Parchment Studios (It started as a joke...)<br>