[PD] MIDI Latency!!!

danomatika danomatika at gmail.com
Sat Jul 18 17:18:54 CEST 2009

Oh, I also did some tests using the same patch, ctlout to ctlin and I
get the same: ~ 52ms.  I don't know, *seems* fast enough when I'm
playing in near realtime ... hmm

> Hi friend: in windows install asio4all in linux install a kernel with
> low
> latency.Assign in the audio device...
> Best Regards
> Chile
> Jose'

> If you are using a newer Ubuntu, Intrepid or Jaunty, you don't need
> the low latency kernel, you just need to enable realtime permissions
> for audio programs like jack or pd.  I use the stock kernel on both my
> Core 2 2.5Ghz laptop and P3 500Mhz wearable and get 8-20 ms audio
> latency with fast midi as well.
> Note: I still get kind midi stutters using seq24 but that might be
> seq24 and not alsa midi since the hardware midi in and out works fine.
> Here's the settings I use for realtime permissions (from an old Ubutnu
> Studio wiki)
> enable realtime:
> sudo su -c 'echo @audio - rtprio 99 >> /etc/security/limits.conf'
> sudo su -c 'echo @audio - memlock 250000 >> /etc/security/limits.conf'
> sudo su -c 'echo @audio - nice -10 >> /etc/security/limits.conf'
> (Intrepid & Jaunty) add 'audio' group
> sudo addgroup audio
> sudo addgroup yourusername audio
> restart
> I have been meaning put all of my setup info online and will soon, but
> I need to work my website first ... then I can link it back to the pd
> wiki.

Dan Wilcox
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