First a little background.
I’m working on a generative music project with a friend of mine. I am trying to use Renoise to generate MIDI data and send it to various softsynths and a few external synths; some of the DSP devices and routing options in Renoise were absent from my primary DAW, so I figured I’d give the Renoise demo a try. Since the majority of my time producing music has been spent in Ableton Live, just opening Renoise for the first time was a bit of a shell shock. />/>
Anyhow, I’ve managed to accomplish what I initially set out to do (sort of). Namely, using the random waveform in the Meta/*LFO DSP to modulate various parameters in my synthesizers. My problem is that I cannot seem to figure out the relationship between LPB and the LFO device’s LPC value when the random waveform is selected. I was assuming that the random waveform operates in a sample & hold fashion; if this is the case, there seems to be some discrepancy between the value I have set for LPC and what the oscillator actually does.
Here’s what’s happening:
I started a new “song” and configured an *LFO device to modulate CC19 in an *Instr. MIDI Control device. CC19 corresponds to the filter cutoff frequency of an external synth, and it is very obviously functioning. The filter cutoff frequency jumps all over the place (exactly what I’m looking for) and it sounds fantastic.
I left the LPB setting at 4 since I won’t be using Renoise for sequencing and I figured it won’t affect me until I have to ReWire it to Ableton. My problem is that if I set the LPC in the *LFO to 2.00 (which I figured would correspond to a new value being sent on every 1/8th note, since my LPB is set to 4), the sound changes much more rapidly; perhaps 1/64? It moves so quickly that it’s really hard to tell, even if I decrease the BPM to something low like 60. I can only get the *LFO to change the sound on every 1/8th note by changing the LPC to 16.00, but if I select a different waveform (such as the sine), an LPC setting of 2.00 modulates the CC parameter at exactly right frequency.
Can anyone explain to me how the random waveform functions, compared to the other waveforms in the *LFO device?
Does it operate on the same principle as a S&H circuit, or am I completely wrong about that?
Is there another, better/simpler way to do what I’m trying to do with a different DSP device? Perhaps one that functions more like an S&H circuit?
Thanks for reading the wall of text. Any input is greatly appreciated.