seq66
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ahlstromcj
Totally Unstable playback
Just compiled seq66 can't get steady playback. Not sure if it's my system, new to manjaro and might have done a dubious up-date. But it hangs often and then releases a whole bunch of notes... Tried with yoshimi too. same thing... Is my system broken? https://youtu.be/v6H4LGk8Kyc
Check your JACK settings. If the "Period" is large (e.g 2048, 4096, etc.) there is a known issue with the "rtmidi" code. You can change the period in QJackCtl. You can also view the current JACK settings (requires jackdbus):
$ jack_control dp
and look at the line "period: Frames per period (uint:set:1024:2048)" and note that the second number is the current setting. I have it set high at present in order to work on sticky issue #100.
If set high, try setting it to 128. It will still be slightly raggy but generally not noticeable.
Thanks for the video, very helpful to see.
-------- sirjohndfox 05:31 Tue 11 Oct --------
https://youtu.be/v6H4LGk8Kyc
Further investigation leads me to believe it might be something with the realtime kernel and video drivers! bloody annoying! I wonder where to start looking...
Actually can't pin it on the video driver - I don't know enough - but it seemed to stablise when i tried the vanilla kernel. The realtime kernel I'm using is NSPA's https://github.com/nine7nine/Linux-NSPA-pkgbuild
One thing I have noted, is that a real-time kernel is not needed for JACK these days. Still, not sure why that could cause an issue.
-------- sirjohndfox 06:14 Tue 11 Oct --------
As regards the frames, I went down from 128 to 64 no difference.
I've identified some flaws in the configuration of my system overall. I'll fix them and see if the error persists. Feel free to close the issues. Sorry if it was irrelevant.
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------- Original Message ------- On Thursday, October 13th, 2022 at 3:46 AM, C. Ahlstrom @.***> wrote:
One thing I have noted, is that a real-time kernel is not needed for JACK these days. Still, not sure why that could cause an issue.
-------- sirjohndfox 06:14 Tue 11 Oct --------
As regards the frames, I went down from 128 to 64 no difference.
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Whatever you find out, let us know here. It could be very useful to include in the documentation. Thanks!