[PD] Raspberry Pi USB2 audio fixed (apparently)
pimassat at gmail.com
Wed Jul 3 12:06:18 CEST 2013
This Moebius distro looks very interesting. Can you please tell us how you
installed Pd ? From the Raspbian repos ?
Have you tried it with full duplex with your soundcard yet ? What latency
are you getting (I can't get below 15 ms in Raspbian with some fft in my
Also is this think about the power supply true ? They mention it too on the
Satellite CCRMA webpage. Where can I buy a power cable that outputs 5.2 V ?
I'm currently using a samsung smartphone charger.
That's a lot of questions but you made me curious (and hopeful again) !
2013/7/3 Julian Brooks <jbeezez at gmail.com>
> I'm having good results from using a much leaner install - it's called
> 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.
> 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):
>> Could be worth asking him?
>> 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.
>>> Dan Wilcox
>>> Pd-list at iem.at mailing list
>>> UNSUBSCRIBE and account-management ->
>> Dan Wilcox
> Pd-list at iem.at mailing list
> UNSUBSCRIBE and account-management ->
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