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. >>> >>> >>> _______________________________________________ >>> Pd-list@iem.at mailing list >>> UNSUBSCRIBE and account-management -> >>> http://lists.puredata.info/listinfo/pd-list >>> >>> >> >
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