[PD] [OT] Raspberry Pi Wolfson Audio Card

[Winfried Ritsch]

Hi, 

Thanks for the response.

I am trying to get some free time this weekend for publicate this work for 
collaboration.

mfg
 winfried

Am Dienstag, 18. März 2014, 12:43:40 schrieb Pierre Massat:
> Hi,
> 
> I've been tried to reduce the size of my setup for a while now, hoping that
> the RPi would be the solution. I'm definitely interested in your work.
> 
> Cheers,
> 
> Pierre.
> 
> 2014-03-18 12:02 GMT+01:00 Winfried Ritsch <ritsch at iem.at>:
> > Am Donnerstag, 13. März 2014, 16:01:20 schrieb Rafael Vega:
> > > Anyone wants to share their experience with the BeagleBoneBlack?
> > 
> > Yes.
> > 
> > Since autumn, i am trying to set up an kit hardware+software with BBB for
> > computer-musicians as stomp box, works quite well, after successfully
> > installed it in a long term sound installation (headless):
> > 
> > some points short:
> > 
> > system:
> >  + BBB moved to Debian since this year (good)
> >  + USB Audio works fine und better now with kernel >= 3.12
> >  + Network performance works better with kernel >= 3.12
> >  - IO support doenst use device-tree overlays anymore on kernel > 3.8
> >  + an iio-backend for Jack2 to use the internal AD's
> >  
> >    in jack for processing sensor data in PD ;-)))  but tricky
> > 
> > sound:
> >  + down to 10ms with PD and cheap 8 channel out, 2 in
> >  
> >    USB soundcard Logilink 7.1    (EUR 19.90)
> >  
> >  +  5ms with Logilink stereo USB (EUR 3,90)
> >  + success with audio-cape (stereo, but too expensive for the quality)
> >  - sound quality is normally as bad as on most notebooks, tablets and so
> >  on
> >  + but with a trick: filtered 5V supply for the USB-card not the USB power
> >  
> >    it seems to get reasonable quality
> >    (They have all the same chips like expensive USB cards: C-Media)
> > 
> > I just made a blog on this, but it is not public only for intern usage, if
> > anyone is interested in the IEM-embedded-Sound-Kit (doing some audio over
> > ethernet stuff) i can make it open (after some polishing, especially the
> > english) and release the PD-lib (GPIO,AD,I2C,... interfacing) for these
> > devices.
> > 
> > This dev's should also work for Cubie-boards, Wand-boards, UDOO and other
> > arm
> > based boards.
> > 
> > mfg
> > 
> >  winfried
> > 
> > PS: Maybe we can start an own thread on this.
> > 
> > > On Thu, Mar 13, 2014 at 3:11 PM, Brian Fay <ovaltinevortex at gmail.com>
> > 
> > wrote:
> > > > While I'm sure that Dan is right that the UDOO is the better choice
> > > > for
> > > > USB audio, I do have to say that I've had decent success using my
> > > > Raspberry
> > > > Pi as a guitar effects processor, with the Behringer UCG102 interface.
> > > > 
> > > > There's definitely a lot of quirkiness to getting it running... for
> > > > example ALSA gets in an infinite restart loop when attempting low
> > 
> > latency
> > 
> > > > on pd-extended, but vanilla starts up fine under the same settings.
> > > > And
> > > > then there's the fact that an issue in the kernel screws up USB audio
> > 
> > on
> > 
> > > > major distros like Raspbian.
> > > > 
> > > > I'm using the Satellite CCRMA distro right now with much better
> > 
> > success.
> > 
> > > > So far I've got various delays, a looper, and a waveshaper distortion
> > > > running within the same patch, at <20ms latency with very few
> > 
> > noticeable
> > 
> > > > dropouts. Parameters are adjustable with a QuNeo MIDI controller and
> > 
> > with
> > 
> > > > a
> > > > button attached to the GPIO pins.
> > > > 
> > > > The Pi is a bit more affordable than the UDOO boards, but then again I
> > 
> > had
> > 
> > > > to buy a powered USB hub. Ultimately for one audio input the Raspberry
> > 
> > Pi
> > 
> > > > could probably serve most purposes, while the UDOO is more likely to
> > 
> > scale
> > 
> > > > to bigger installations.
> > > > 
> > > > _______________________________________________
> > > > Pd-list at iem.at mailing list
> > > > UNSUBSCRIBE and account-management ->
> > > > http://lists.puredata.info/listinfo/pd-list
> > 
> > --
> > ---
> > 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
> > ---
> > 
> > 
> > _______________________________________________
> > Pd-list at iem.at mailing list
> > UNSUBSCRIBE and account-management ->
> > http://lists.puredata.info/listinfo/pd-list

-- 
---
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
---