[PD] Raspberry Pi USB2 audio fixed (apparently)

[Julian Brooks]

I'm having good results from using a much leaner install - it's called
Mobius:
http://moebiuslinux.sourceforge.net/

Obviously depends on your usage but I'm ssh'ing into the pi and works
great.  The minimal install seems to help with overclocking too so I reckon
I'm getting about another 35-40% out of the pi.

The main project I've been working on has a pmpd patch that the regular
raspbian wouldn't even run, on top of that I'm driving a couple of sensors
(thanks Martin:), audio synthesis, got a reasonably complex quad
spacialisation patch (thanks Lorenzo:) and is driving a 6 channel
soundcard.  This is without the usb-slowdown option.

Obviously it's pushing the Pi right up to the limit but it runs*
just*about stably.

What I do think made a significant difference was switching the power cable
to one that outputs 5.2v so by the time it gets to the pi it's a solid 5v.

Julian


On 3 July 2013 09:42, Dan Wilcox <danomatika at gmail.com> wrote:

> Yeah I tried that out a few months ago when we started the thread. Jack
> adds some unnecessary overhead in my opinion and I'm surprised that a
> device that should be more than capable to handle this is just not setup
> correctly. I'm running a minimal commandline install and pd + realtime &
> straight alsa should work great ... it has for me in the past.
>
> His jack setup basically uses *all* the cpu of the pi, so that cuts out
> the other parts of my setup altogether .. visual, device input, etc. Again,
> I was able to get good latency with a much lower resource machine (until it
> just wore out), so it *should* be possible.
> On Jul 3, 2013, at 4:35 AM, Julian Brooks <jbeezez at gmail.com> wrote:
>
> Hey Dan,
>
> Jeremy (autostatic), who setup the 'rpi and low latency, real time audio'
> thread has a UA-25 and seems to have full duplex working with jack (this
> was before the recent tweaks as well):
>
> http://www.raspberrypi.org/phpBB3/viewtopic.php?p=286222&sid=85c8b0a7cca69e35dcafaf58ff916eec#p286222
>
> Could be worth asking him?
>
> Julian
>
>
> On 3 July 2013 02:58, Dan Wilcox <danomatika at gmail.com> wrote:
>
>> Yeah I tried the latest firmware with my Raspbian install and still have
>> issues with my UA-25. Full stereo duplex = dropouts. :(
>>
>> On Jul 2, 2013, at 5:52 PM, pd-list-request at iem.at wrote:
>>
>> *From: *Pierre Massat <pimassat at gmail.com>
>>  *Subject: **Re: [PD] Raspberry Pi USB2 audio fixed (apparently)*
>>  *Date: *July 2, 2013 3:52:31 PM EDT
>> *To: *Julian Brooks <jbeezez at gmail.com>
>>  *Cc: *PD List <pd-list at iem.at>
>>
>>
>>  Hi all,
>>
>> I did a fresh install of Raspbian using the NOOBS installer. The
>> pd-extended package from puredata.info doesn't work with my soundcard
>> (it wasn't working before). And Pd vanilla installed from the Raspbian
>> repositories doesn't work with it either (although it was working fine
>> before). My soundcard is an old EMU 0404 USB. By "doesn't work" I mean that
>> it either throws an "Audio stuck/closing audio" error, or simply freezes
>> everything (Pd, LXDE, mouse, everything) and all I can do is unplug the
>> power chord.
>>
>> So for me not only did it not fix anything, but i'm actually worse off
>> and left with the inability to use Pd at all on my Pi.
>>
>> I haven't tried Miller's compiled version of Vanilla yet (I still don't
>> know how it is different from the one available in the Raspbian repos). The
>> recent Planet CCRMA Satelite for the RPi is also an option.
>>
>> Pierre.
>>
>>
>>  --------
>> Dan Wilcox
>> @danomatika
>> danomatika.com
>> robotcowboy.com
>>
>>
>>
>>
>>
>>
>> _______________________________________________
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>> UNSUBSCRIBE and account-management ->
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>>
>
> --------
> Dan Wilcox
> @danomatika
> danomatika.com
> robotcowboy.com
>
>
>
>
>
>
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