<div dir="ltr"><div><div><div><div>Hi Ralf,<br><br></div>The output of cat was powersave for all cpu's.<br><br></div>the irq stat:<br><br> PID CLS RTPRIO NI PRI %CPU STAT COMMAND <br> 539 FF 90 - 130 0.0 S irq/17-snd_hda_ <br> 558 FF 90 - 130 0.0 S irq/126-snd_hda <br> 112 FF 85 - 125 4.4 S irq/122-xhci_hc <br> 114 FF 80 - 120 0.0 S irq/1-i8042 <br> 113 FF 79 - 119 0.0 S irq/12-i8042 <br> 58 FF 50 - 90 0.0 S irq/9-acpi <br> 115 FF 50 - 90 0.0 S irq/8-rtc0 <br> 178 FF 50 - 90 0.0 S irq/19-mmc0 <br> 185 FF 50 - 90 0.0 S irq/123-0000:00 <br> 409 FF 50 - 90 0.0 S irq/124-mei_me <br> 488 FF 50 - 90 0.0 S irq/125-iwlwifi <br> 922 FF 50 - 90 0.0 S irq/128-enp59s0 <br> 1667 FF 50 - 90 0.0 S irq/127-nvidia <br> 179 FF 49 - 89 0.0 S irq/19-s-mmc0 <br> 489 FF 49 - 89 0.0 S irq/125-s-iwlwi <br> 3 TS - 0 19 0.0 S ksoftirqd/0 <br> 14 TS - 0 19 0.0 S ksoftirqd/1 <br> 19 TS - 0 19 0.0 S ksoftirqd/2 <br> 24 TS - 0 19 0.0 S ksoftirqd/3 <br> 29 TS - 0 19 0.0 R ksoftirqd/4 <br> 34 TS - 0 19 0.0 S ksoftirqd/5 <br> 39 TS - 0 19 0.0 S ksoftirqd/6 <br> 44 TS - 0 19 0.0 S ksoftirqd/7 <br><br><br></div>That said, Paul suggested I give the Ardour ALSA backend a try. (Thanks Paul, I learned something new about Ardour!)<br><br></div><div>Unfortunately I got the same results.<br><br></div><div>So, back to basics, a made a list of things I had and hadn't tried.<br><br></div><div>Assumptions are the nemesis of trouble shooting. I had grabbed a long-ish usb cable of unknown origin. When I replaced it with a shorter, brand new cable the issue went away and seems to work for both JACK and the ALSA only backend in Ardour.<br><br></div><div>I assumed if the usb ports were connected the cable was probably ok. Guess I was wrong. I guess something about the cable was causing high error rates (capacitance, grounding, shielding, etc.).<br></div><div><br></div><div>Regards,<br></div><div>Mac<br></div><div><div><div><div><div><div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Aug 8, 2016 at 8:35 AM, Ralf Mardorf <span dir="ltr"><<a href="mailto:ralf.mardorf@alice-dsl.net" target="_blank">ralf.mardorf@alice-dsl.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span class="">On Mon, 8 Aug 2016 08:24:25 -0400, Mac wrote:<br>
>During playback, there are random clicks<br>
<br>
</span>If you run<br>
<br>
cat /sys/devices/system/cpu/cpu*/<wbr>cpufreq/scaling_governor<br>
<br>
the output should be "performance" for each core of your CPU.<br>
<br>
If it shouldn't be "performance", then run<br>
<br>
echo performance|sudo tee /sys/devices/system/cpu/cpu*/<wbr>cpufreq/scaling_governor<br>
<br>
Consider to post the output of<br>
<br>
/etc/init.d/rtirq status<br>
<br>
Regards,<br>
Ralf<br>
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