[PD-ot] Raspberry Pi (still is: openstomp ... PD pedal?)

[Michael Zacherl]

Hey Ed, 
did you follow the various threads on the main-list?
Could be interesting!

Currently I'm investigating the possibilities of this little thing for installation and performance stuff.
It's limited but I can see its potential.
Admittedly I'm spoiled by Mac OS X, and I did Linux only for commercial server stuff, audio wasn't really needed.
I got an old Waveterminal U24 USB audio interface which I tried to connect to the RPi running Pd-extended.
I have no clue wether this interface is Class Compliant or not, I got some sound out of it for a couple of seconds until everything bursts into a stream of white noise.
The same patch works fine using the internal audio out (HDMI and analogue within limits).
Powerwise, as I posted on the mainlist, I think nice things can be done and there's potential to strip down the system to reduce basic load.
Would be nice if we achieved something useable based on this.  :-)
Michael.   

On 4.3.2012, at 18:15 , Ed Kelly wrote:

> Hmm. Doesn't seem to have an audio input though, so perhaps it'll work for a synthesizer but not for a "stompbox" straight away. The site recommends a "USB microphone" for audio in, so that's not encouraging...
> Ed
> 
> 
>> So what about a Raspberry Pi  inside a stompbox that runs pd?
>> But could the arm11 in that thing handle awesum (sic) audio processing? ;)
> 
> Well the Raspberry Pi is based on an ARM chip. Does anyone know how these chips compare when running RJDJ or libPD applications?
> Perhaps this is a possibility, without too much modification of libPD or even RJDJ.
> ...but someone would need to write a host for the Raspberry Pi.
> 
>> What do you need by "writing a host for Pd"? Something like a very simple OS?
> 
> Er..well I can see they run Linux, so I think I was mistaken. My head was in the world of BASIC - nostalgia gets in the way of the facts!
> Of course, Pd would need to be compiled for the hardware.
> 
> I think we need to wait until one of us gets one and tries it out before we find out what they're capable of. I've expressed interest, but they're massively oversubscribed.
> 
> 
>> I bought mine yesterday, and should receive it in about a week. The first thing I'll do is try to install Pd.
> 
> 
> On the other hand, the idea of a dedicated PDOS isn't a bad idea...
> Ed
> 
>> Yes, how hard would it be to have this?
> Well, it could be a highly stripped-down version of Linux. I don't think anyone has the time to write an OS, so I was being mischievous in suggesting this. I am having some funny ideas today...
> Ed
> 
> Pierre.
> 
> 
> Even if it was just the PD core, it would enhance the educational scope of the Raspberry Pi - which is the whole point of this single-board computer (I learned my first programming on a Sinclair ZX Spectrum in the 1980s).
> 
> I never thought I would see the day when the BBC Microcomputer would rule the world in telecommunications, but ARM chips and the ARM RISC instruction set are running  every smartphone on the planet right now (correct me if I'm wrong :) and some of these smartphones run RJDJ and libPD really well.
> 
> Dataflow music programming in schools. Maybe...
> 
> Ed



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