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@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.

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Ritsch, Winfried, Ao.Univ.Prof. Dipl.-Ing.
  Institut 17 Elektronische Musik und Akustik
  8010 Graz, Inffeldgasse 10/III
E-Mail  ritsch@iem.at
Homepage  http://iem.at/ritsch
Mobil  ++436642439369
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