Hi Dan, Thanks for sharing these notes. They arrived in my inbox to coincide nicely with the delivery of my quad Udoo this morning! It would be great to see a full writeup of your Udoo setup at some point as I think many people will want to be doing a similar thing.
All best, Jamie On 11 Mar 2014, at 14:14, Dan Wilcox <danomat...@gmail.com> wrote: > Heres a trim of my notes: > > Enable realtime audio priority (if you haven't done it already): > > 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' > > I disable pulseaudio. Make sure pulseaudio does not respawn itself (from > http://voices.canonical.com/david.henningsson/2012/07/13/top-five-wrong-ways-to-fix-your-audio): > > echo autospawn=no > ~/.pulse/client.conf > > Also add the following to ~/.bash_login to kill pulse audio if it's running > on login: > > # kill pulse audio if it was spawned > pulseaudio -k > > I'm not looking at the udoo run script, but I'm pretty sure I'm using the > following with the US-25EX USB soudcard: > > pd -rt -nogui -alsa -audiodev 5 > > Use pd -listdev to get the device list from alsa. I chose 5 as the first 4 > (from memory) are 1-2 (built in hardware & plugin) & 2-3 (HDMI audio hardware > & plugin). 5 is the USB hardware alsa dev. > > On Mar 11, 2014, at 4:05 AM, Simon Iten <itensi...@gmail.com> wrote: > >> without jack i should add... >> On 11 Mar 2014, at 08:55, Simon Iten <itensi...@gmail.com> wrote: >> >>> hey dan, >>> >>> unfortunately i’m in switzerland :-) >>> >>> would be great if you could post your setup somewhere or send the infos! i >>> compiled pd from source as well. i start it from console (with -rt) and it >>> works without problems with the builtin sound card. maybe the cheap card >>> from dx.com just does not work properly with udoo. >>> but please post your setup. >>> >>> thanks >>> >>> On 09 Mar 2014, at 22:26, Dan Wilcox <danomat...@gmail.com> wrote: >>> >>>> I've tried my both Roland Edirol UA-25 & UA-25EX and both work great. The >>>> dedicated USB controller makes these guys work as compared to an RPI where >>>> I can't get full duplex without tons of dropouts. I'm using a Linaro >>>> install which boots to the console and runs the PD through scripting. The >>>> speed is great as compared to my old wearable computer. 4 cores makes a >>>> difference. >>>> >>>> I had to recompile my kernel to add midi support, but that's working >>>> great. It's not too bad, actually. I also built Pd-vanilal from source >>>> which was pretty easy using ./configure + make. I also have a script which >>>> fetches externals and builds/installs the agains vanilla so I have the few >>>> externals I need. >>>> >>>> As with my previous experience running Pd + embedded Ubuntu, I get great >>>> performance with RT permissions, the -rt startup flag, and ALSA. Jack is >>>> needless overheard unless you want to work with other Jack-enabeld apps. >>>> Same with X windows, although my setup was running great in X with pd + >>>> ALSA in testing. >>>> >>>> From your description, it sounds like your main issue is jack & pd are >>>> probably not running in realtime. >>>> >>>> I can sent you my install notes if you want (or put them online, as I've >>>> been meaning to). Also, are based in the NE within driving distance to >>>> Pittsburgh? We could do a patching circle/UDOO setup afternoon :D >>>> >>>> On Mar 9, 2014, at 5:14 PM, pd-list-requ...@iem.at wrote: >>>> >>>>> From: Miller Puckette <m...@ucsd.edu> >>>>> Subject: Re: [PD] udoo board sound issues >>>>> Date: March 9, 2014 at 5:07:54 PM EDT >>>>> To: Simon Iten <itensi...@gmail.com> >>>>> Cc: PD list <pd-list@iem.at> >>>>> >>>>> >>>>> H iSimon - >>>>> >>>>> I haven't tried any but the built-in yet but I have a few USB interfaces >>>>> around here that I can try. I'm about to go on an intense trip but should >>>>> be able to do some tests when I get back, assuming nobody else has figured >>>>> this out first. >>>>> >>>>> cheers >>>>> Miller >>>>> >>>>> On Sun, Mar 09, 2014 at 09:57:45PM +0100, Simon Iten wrote: >>>>>> hey list, >>>>>> >>>>>> does anybody that uses an udoo board have any recommendations on a >>>>>> usb-soundcard? should be very compact. >>>>>> i tried a cheap one from dx and i could not get any good results (loads >>>>>> of xruns even with periods 3 and 1024 and up frames in qjackctl) this is >>>>>> on the ubuntu version from udoo. >>>>>> are there some tweaks i can do to improve usb-sound capabilities? i >>>>>> thought maybe recompile the kernel with only usb-1 support since there >>>>>> is no option as on the pi to disable usb-2 via config, or am i missing >>>>>> something? >>>>>> is it better to use the usb-soundcard without jack (pd does not like the >>>>>> usb-soundcard either when i tried briefly)? >>>>>> >>>>>> the internal sound-input is to noisy for my application (guitar effect) >>>>>> >>>>>> cheers. >>>>>> _______________________________________________ >>>>>> Pd-list@iem.at mailing list >>>>>> UNSUBSCRIBE and account-management -> >>>>>> http://lists.puredata.info/listinfo/pd-list >>>> >>>> -------- >>>> Dan Wilcox >>>> @danomatika >>>> danomatika.com >>>> robotcowboy.com >>>> >>>> >>>> >>>> >>>> >>> >> > > -------- > Dan Wilcox > @danomatika > danomatika.com > robotcowboy.com > > > > > > _______________________________________________ > Pd-list@iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list
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