On 21/04/15 07:42, Pagano, Patrick wrote:
I figured that would be what i would need to do
run pd with -nogui and arduino stuff that Hans wrote for the potentiometer
control
a simple toggle on the faceplate that switches between maybe 5 patches that are
unavailable in traditional analogia
1.) Phase Locking vocoder
2.) Granular synthesis
3.) FFT of some sort
4.) Sample and Hold, still need a patch that takes in a live osc~
5.) a waveform patch that loads a simple osc~/phasor for RIngMod/Am/FM etc...
The other issue is that the raspi that i have does NOT have a line in, only a
line out for sound
i bought a little USB soundblaster card for that to see if i can get audio in
to a ADC~
One of the cards using the digital audio interfaces is probably a better idea,
to avoid all the very poor USB on the RPi.
I've used the Wolfson ones and they have proved very reliable (the main issue
for me is that I can't use them directly from the GPU since I can't set them as
the default output ... but via alsa from userspace they are great). They take a
bit of setting up (a custom kernel which works fine with raspbian wheezy at
least, plus a few scripts) but then are very flexible and control-able via alsa,
including the ability to choose which audio clocks to use.
The version for the older models ...
http://www.adafruit.com/products/1761
There are also versions for the + models using the 40pin breakout.
There are also cards which have fewer in-out options but they are probably
easier to use, I have not tried them ....
https://www.hifiberry.com/
Simon
PS
I have some notes from a project here that may help setting the wolfsons up, a
bit rambling but do have some useful info ...
https://www.dropbox.com/s/1scwpdufk41k4es/04.setupWolfsonAudio.txt
there is apparently a recently updated kernel for raspbian wheezy here ...
https://blog.georgmill.de/2015/02/18/update-for-wolfson-audio-card-on-raspberry-pi/
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