Looper makes noise after some time

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freetree
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Joined: Sat Jun 23, 2018 9:30 pm

Looper makes noise after some time

Post by freetree »

Hello guys,

at the moment I'm building aloopstation with a RPI3 Jack and sooperlooper.
I'm using a UMC202HD Audio Interface, jack and sooperlooper to do the looping.
I'm starting jack like this:
/usr/bin/jackd -P95 -dalsa -r48000 -p64 -v -n2 --realtime -D -Chw:U192k -Phw:U192k &

Everything works fine until 5min. Then the sound start to get very noisy.
I get no Xruns and the cpu runs at 50%.

I have no idea what i can do to debug this.
Any idea?
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khz
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Re: Looper makes noise after some time

Post by khz »

:welcome:

This isn't really a solution to your problem, but do you have the limits.conf entry?
limits.conf > Must have! >> https://wiki.linuxaudio.org/wiki/system ... faudioconf

As orientation or meta information maybe my incomplete thought snippets could be, see signature. ;-)
. . . FZ - Does humor belongs in Music?
. . GNU/LINUX@AUDIO ~ /Wiki $ Howto.Info && GNU/Linux Debian installing >> Linux Audio Workstation LAW
  • I don't care about the freedom of speech because I have nothing to say.
freetree
Posts: 2
Joined: Sat Jun 23, 2018 9:30 pm

Re: Looper makes noise after some time

Post by freetree »

Mhh, I'm already set this options.

I'm also running a self compiled rt kernel.
This a my test results:

Code: Select all

# Total: 001009694 001009684 001009667 001009650
# Min Latencies: 00005 00005 00005 00005
# Avg Latencies: 00014 00014 00014 00014
# Max Latencies: 00114 00109 00238 00112
# Histogram Overflows: 00000 00000 00000 00000
I think its a problem of jack. I noticed, that the problem is related to the buffer size.

Could it be that if I'm in the soft mode jack does not show me the xruns.
Because if I deactivate the soft mode I get some xruns at the buffer sizes that are related to the noise I hear.

So i guess I have to optimize my setup to work with better buffer sizes.
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khz
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Re: Looper makes noise after some time

Post by khz »

freetree wrote: I think its a problem of jack. I noticed, that the problem is related to the buffer size.

Could it be that if I'm in the soft mode jack does not show me the xruns.
Because if I deactivate the soft mode I get some xruns at the buffer sizes that are related to the noise I hear.

So i guess I have to optimize my setup to work with better buffer sizes.
@buffer size, soft mode and optimize my setup
Yes or ack
JACK – A Beginners Guide to Getting Started with JACK >> http://libremusicproduction.com/article ... arted-jack
. . . FZ - Does humor belongs in Music?
. . GNU/LINUX@AUDIO ~ /Wiki $ Howto.Info && GNU/Linux Debian installing >> Linux Audio Workstation LAW
  • I don't care about the freedom of speech because I have nothing to say.
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