Re: [ubuntu-studio-users] midi lag with roland F20 piano, usb connected

[Ralf Mardorf]

On Wed, 30 Aug 2017 14:52:28 -0400, Juan Hernandez wrote:
>Is there any known issue with usb-midi?
  ^^^ Yes, there is...
...but no, AFAIK the issue you experience isn't a known issue. Yes, USB
MIDI is known to cause more MIDI jitter, than other MIDI interfaces.
You could reduce MIDI jitter by using a rt-patched kernel. Regarding
latency, mainline kernels, such as the Ubuntu lowlatency kernel, are
not optimal, it's better to build a rt-patched kernel, since this also
reduces MIDI jitter.

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Re: [ubuntu-studio-users] midi lag with roland F20 piano, usb connected

[Juan Hernandez]

can you start the app on the terminal and copy any logs you might get?

On Wed, Aug 30, 2017 at 2:35 PM, bart deruyter 
wrote:

> Hi all,
>
> I'm having quite a midi problem here. My digital piano, Roland F-20 is
> connected to my PC by usb. At first it seems to work quite well, but out of
> the blue, while working in Ardour (5.11.4) , when editing notes, I don't
> get any sound anymore. Then I notice the notes get played anyway, with a
> really giant lag,
>
> I'm not talking milliseconds, I'm talking seconds to even half a minute.
> Most of the time playback just stops and then suddenly, as if the system
> wants to catch up, all notes are played at such a speed it sounds like the
> notes are played simultaneously (maybe it even is simultaneously). It
> happens that my piano is unresponsive (I think, no music is played) for
> minutes.
>
> I do connect with jack-midi, because Ardour doesn't use alsa midi anymore.
>
> Is there any known issue with usb-midi? Or should I change some setting in
> a config file? Perhaps somewhere a change in priority?
>
> My system is Ubuntustudio 17.04, 64 bit.
>
> Grtz,
>
> Bart
>
> http://www.bartart3d.be/
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