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<p style="margin-top:0;margin-bottom:0">I just went through this ordeal with an MboxPro3 and ubuntu/LowLatency Kernel</p>
<p style="margin-top:0;margin-bottom:0">the answer for me was using a FW soundcard and Cadence from KxStudios. It solved the under/overrun problem</p>
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<p><span style="color:rgb(0,111,201); background-color:rgb(255,255,255)">Patrick Pagano B.S, M.F.A</span></p>
<p><i><span style="font-size:9pt; color:rgb(0,111,201); background-color:rgb(255,255,255)">Assistant Professor in Residence</span></i></p>
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<p><i><span style="font-size:9pt; color:rgb(0,111,201); background-color:rgb(255,255,255)">University of Connecticut, Stamford</span></i></p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Pd-list <pd-list-bounces@lists.iem.at> on behalf of Dan Wilcox <danomatika@gmail.com><br>
<b>Sent:</b> Tuesday, January 30, 2018 5:21:33 PM<br>
<b>To:</b> Roman Haefeli<br>
<b>Cc:</b> Pd-List<br>
<b>Subject:</b> Re: [PD] glitches when streaming UDP</font>
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<div class="" style="word-wrap:break-word; line-break:after-white-space">If you're using jack, is the jack server running without dropouts with other software? I'm only suggesting to consider sources other than Pd as well.<br class="">
<div><br class="">
<blockquote type="cite" class="">
<div class="">On Jan 30, 2018, at 9:25 PM, <a href="mailto:pd-list-request@lists.iem.at" class="">
pd-list-request@lists.iem.at</a> wrote:</div>
<br class="x_Apple-interchange-newline">
<div class=""><span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">Date:
Tue, 30 Jan 2018 21:25:26 +0100</span><br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">From:
Roman Haefeli <</span><a href="mailto:reduzent@gmail.com" class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; orphans:auto; text-align:start; text-indent:0px; text-transform:none; white-space:normal; widows:auto; word-spacing:0px">reduzent@gmail.com</a><span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">></span><br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">To: Pd-List
<</span><a href="mailto:pd-list@lists.iem.at" class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; orphans:auto; text-align:start; text-indent:0px; text-transform:none; white-space:normal; widows:auto; word-spacing:0px">pd-list@lists.iem.at</a><span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">></span><br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">Subject:
Re: [PD] glitches when streaming UDP</span><br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">Message-ID:
<</span><a href="mailto:1517343926.2187.14.camel@gmail.com" class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; orphans:auto; text-align:start; text-indent:0px; text-transform:none; white-space:normal; widows:auto; word-spacing:0px">1517343926.2187.14.camel@gmail.com</a><span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">></span><br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">Content-Type:
text/plain; charset="utf-8"</span><br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">On Die,
2018-01-30 at 16:38 +0100, Dan Wilcox wrote:</span><br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<blockquote type="cite" class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; orphans:auto; text-align:start; text-indent:0px; text-transform:none; white-space:normal; widows:auto; word-spacing:0px">
Is it running with the *same* OS and settings?<br class="">
</blockquote>
<br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">As far
as I can tell: yes. Same OS (Ubuntu 16.04), same Kernel (4.13.0-</span><br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">32-lowlatency),
both tuned so that "realtimeconfigquickscan" doesn't</span><br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">complain
anymore. This includes configuring /etc/security/limits.conf,</span><br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">adding
user to audio group, making high-precision timer /dev/hpet und</span><br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">realtime
clock /dev/rtc readable by members of audio group, etc. I get</span><br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">stable
performance with Ardour with the same qjackctl settings, with</span><br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">built-in
soundcard, but also with external USB sound interface on BOTH</span><br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">machines.</span><br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<blockquote type="cite" class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; orphans:auto; text-align:start; text-indent:0px; text-transform:none; white-space:normal; widows:auto; word-spacing:0px">
It might be a scheduling issue with the kernel, realtime settings,<br class="">
crappy networking driver, etc. <br class="">
</blockquote>
<br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">I thought
about that, too. But why does it affect only Pd? On the</span><br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">"troubled"
machine - where everything else runs supersmooth - this</span><br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">setup
suffers a couple of glitches per second (jack routing):</span><br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">mpv ->
Pd running [adc~]-[dac~] -> system output</span><br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">The probable
causes you mentioned would affect other audio softwares,</span><br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">too,
wouldn't they? </span><br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">The Pd
version doesn't seem to make a difference...</span><br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">Anyway,
thanks for your thoughts.</span><br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<br class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px">
<span class="" style="font-family:Monaco; font-size:12px; font-style:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; float:none; display:inline!important">Roman</span></div>
</blockquote>
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--------</div>
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Dan Wilcox</div>
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<a href="http://twitter.com/danomatika" class="">@danomatika</a></div>
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<a href="http://danomatika.com" class="">danomatika.com</a></div>
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<a href="http://robotcowboy.com" class="">robotcowboy.com</a></div>
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