Ed: I don't really get what is your conversion for, can you elaborate a bit
more?
Tim: I've been already using [pix_sig2pix~] :)
That said, thanks to rdz and matju on IRC I've managed to solve the high
frequency issue. Actually the problems were two: me considering a crazy
thing to set a sample rate in the mhz domain and the hardcoded limitation
in the portaudio api of 2 mhz (if you go past this value it will reset the
sample rate without telling you, that's why my first experiments were
unsuccessful).
Right now [pix_sig2pix~] is now working as aspected, 1 mhz frequency is
enough to have all the vertical bars and stuff. I'll need to fine tune
[block~] but I think it will work quite nicely in the end.
Thanks everybody for the help!
2012/7/12 tim vets timv...@gmail.com
2012/7/12 tim vets timv...@gmail.com
[sig2pix~] ?
sorry, that shoulld be: [pix_sig2pix~]
2012/7/12 Off Screen offscr...@personalreport.it
Hello everybody,
I'm trying to emulate an analogue video synthesizer using GEM. My
starting point is the LZX system, an old school analogue video synth which
has been rebuilt today using modern circuitry components. Obviously that
wonderful tool is way too expansive for me so I thought I could build
something similar using Pd.
My first goal is to succesfully emulate the Video Waveform Generator:
http://www.youtube.com/watch?v=pbpFgvttBZw
Here is a detailed description:
http://www.lzxindustries.net/modules/video-waveform-generator
I've tried to use [pix_sig2pix~], it works quite nicely and the patterns
I get are almost identical to the ones in the video (including all the fm
and pwm stuff). The problems are in the second part of the video, when they
use high frequencies (~ 3mhz) to generate vertical bands. I'm pretty sure I
can't use the same approach with Pd.
The other option would be to use GLSL shaders, but it has two major
drawbacks: first, it won't be using raw signal but control messages (no
sound generation); second, it won't be patchable, once the parameters are
converted into an image all the informations about frequencies are lost and
I won't be able to use it to modulate another shader.
I'd like to know from somebody who has much more experience than me what
would be the best approach. Are there any limitations or constraints within
the [pix_sig2pix~] object or Pd itself that I should be aware of? Any
advice will be extremely appreciated.
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