Hi all, I implemented a LFO random for the VCF. Though, my pseudo random number generator is not great. I'll have to find a better one but it works. I've also implemented it with depth control using parameter 84. I like the sound of doing a chromatic randomise. I'll have to think about how to implement that though. The problem right now is that the LFO applied to the DCO only shifts the frequency up or down ONE semitone. So the LFO really doesn't push the DCO frequency much at all. That's why I've not bothered to do the random on it at this point. So when I develop the second LFO, I will write code to support pushing the DCO frequency across a wide range. We know the hardware can do it because the joystick is able to flex the DCO a full octave. ; my pseudo random number generator - used for the LFO randomiser RANDOMIZE: lxi h, M_RANDOM mov a, m cpi 0 jnz RANDOMIZEA cma mov m, a RANDOMIZEA: rlc adi 43 mov m, a ret Mike. --- In korgpolyex@yahoogroups.com, Atom Smasher <atom@...> wrote: > > On Mon, 19 Nov 2007, Neil Wakeling wrote: > > > Hmmm - could we have a random sample and hold LFO? > ================= > > one nice thing about the kawai K3 was the LFO had a mode that's like > random, but the levels of output corresponded to a 12 note scale. i think > they called it "chromatic random". would that be feasible? > > i'm curious how you're implementing a "random" LFO in the poly800...? is > there enough CPU power to do a PRNG, or is it based on a look-up table? > how long is the cycle? > > > -- > ...atom > > ________________________ > http://atom.smasher.org/ > 762A 3B98 A3C3 96C9 C6B7 582A B88D 52E4 D9F5 7808 > ------------------------------------------------- > > "Growth for the sake of growth is > the ideology of the cancer cell." > -- Edward Abbey >
Message
LFO random VCF - completed
2007-11-22 by korgpolyex800