[PD] olimex board

[katja]

On Sun, May 31, 2015 at 9:52 AM, Raphaël Ilias <phae.ilias at gmail.com> wrote:
> Hello,
>
> Updating this thread about Olimex's OlinuXino board (A20-LIME & A20-LIME2)
> I still get the following error (in fact the console gets filled with dozens
> of them in a few seconds) :
>
> "ALSA output error (restart failed): Broken pipe"
>
> And the all DSP gets "stuck", it is not computed anymore (i.e. [env~]
> doesn't output anymore). I tried to make an abstraction to detect that dsp
> isn't "active" and restart it (";pd dsp 0", then ";pd dsp 1" -- the DSP
> button stays ticked).
>
> This error appears at every startup of pd, and then randomly, I think mostly
> when opening new patcher window or on CPU load peaks. In general, pd's gui
> is quite slow (maybe normal on such board), and - don't know if this is
> related - sometimes Xorg crashes (I'm using the precooked debian
> distribution by Olimex)
>
> I remember to read on this list that Raspberry Pi users should use a patched
> version of vanilla for ARM processors, isn't it ? (And Julian also adviced
> me to avoid pd-extended)

That patched version had a fix for denormal numbers on ARM, but the
fix was included in vanilla Pd soon after. If you use latest vanilla
Pd from Miller's site, chances are best that it will work with an ARM
board. On Raspberry Pi 2 at least it works well for me, but it is
still easy to mess things up: a short current consumption peak may
cause a power brown out which in turn shoots the usb audio card.
Therefore I got used to handle RPi with more care than a robust
laptop: load Pd, wait till it has everything initialized, then turn
dsp on, then load a cpu intensive patch.

>
> I think I'll give a try, but is there a little step-by-step "howto" to learn
> how to install this version on a debian ?
>
> Any help much appreciated !
>
> cheers,
>
> Raphaël
>
>
> 2015-05-22 12:44 GMT+02:00 Winfried Ritsch <ritsch at iem.at>:
>>
>> just to add my experience.
>>
>>
>>
>> I am now running some Olimex A10-Lime with amplifier boards on a sound
>> installation and it works quite stable.
>>
>>
>>
>> Test-board see:
>>
>>
>>
>> http://puredata.info/docs/embedded/olinuxino/algo_a10board_05_cut.jpg/view
>>
>>
>>
>> I compiled jackd myself excluding dbus service so it worked, but did not
>> get
>>
>> a better performance so I use pd with ALSA directly.
>>
>>
>>
>> mfg
>>
>> winfried
>>
>>
>>
>>
>>
>> Am Mittwoch, 13. Mai 2015, 14:56:28 schrieb Raphaël Ilias:
>>
>> > Hi !
>>
>> >
>>
>> > Just to inform you that I'm currently experimenting with Olimex's
>>
>> > development boards, this might interest some people here (i am not doing
>>
>> > any advertising at all) who are into "mobile puredata"
>>
>> >
>>
>> > the set-up i use consists of
>>
>> > - Olimex's A20-OLinuXino-LIME board (dual core Cortex-A7)
>>
>> > - with their own Debian distribution
>>
>> > - cheap USB audio interface : "Terratec Aureon Dual USB"
>>
>> > - pd-extended 0.43-4
>>
>> > - patching through VNC (and through Wi-Fi)
>>
>> >
>>
>> > And it works.
>>
>> > ..not as fast as on my laptop, of course, but I can run patches ok.
>>
>> > yet, the GUI is indeed quite slow (especially opening a patch)
>>
>> >
>>
>> > However, I have a few troubles, but it might not be the right place to
>>
>> > ask...
>>
>> > I am newbie to debian, so I couldn't setup jack at all. I'm using alsa
>> > but
>>
>> > I get the error at startup :
>>
>> > "ALSA output error (restart failed): Broken pipe"
>>
>> > (and also sometimes when opening patche, I get a bunch of these and DSP
>> > get
>>
>> > stuck, i need to turn OFF and ON again pd's DSP to get audio back.)
>>
>> >
>>
>> > Searching the archive, I saw that some people got the same problem and
>>
>> > resolved it by suspending/de-installing pulseaudio.
>>
>> > But it seems that pulseaudio isn't installed here.
>>
>> > Maybe someone has got a clue, where to search...? (i know this is very
>>
>> > specific problem !)
>>
>> >
>>
>> > all best,
>>
>> >
>>
>> > Raphaël
>>
>>
>>
>> --
>>
>> ---
>>
>> Ritsch, Winfried, Ao.Univ.Prof. Dipl.-Ing.
>>
>> Institut 17 Elektronische Musik und Akustik
>>
>> 8010 Graz, Inffeldgasse 10/III
>>
>> E-Mail ritsch at iem.at
>>
>> Homepage http://iem.at/ritsch
>>
>> Mobil ++436642439369
>>
>> ---
>>
>>
>
>
>
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