I decided to finally tackle one of my long standing synthesis blind spots: FFT. I took Tadej Droljc great Sonographic Sound Processing suit (http://cycling74.com/forums/topic/share-sonographic-sound-processing-diss/)
as starting point and I'm trying to strip out the basics to achieve something that might be useful in a project of mine: sonify realtime openGL rendered textures.
What I'm running up against is that all the examples I've found (in Tadej's work or elsewhere) start with an audio signal, which is converted into frequency domain, processed, then back to audio. I don't have a signal to start with. I start with a matrix that I want to interpret as frequency domain right away. One of my questions is how to deal with the phase plane in such a case.
Attached is my trial so far. It does produce sound but not as expected. The phasor doesn't seem to function as 'play head'. When connecting the number~ box instead of the phasor I'd expect to be able to step through and 'freeze' the frames but it doesn't do that.
Also, after 30 seconds or so it just stops playing. And sometimes it only starts sounding after stopping and starting DAC a couple of times.
I'm surely missing a couple of basic points here. Can someone give me some pointers?