Absolutely loving Beads! The v/oct tracking on density makes for endlessly fascinating waveshaping experiments. Which leads me to this issue: I noticed that when I have a patch cable plugged into Time CV (regardless of whether it’s plugged into anything else or not), if the attenurandomizer is anywhere but 12:00, I get substantial noise, almost as though no patch cable were present. Specifically, here is how to reproduce the issue:
Make sure all attenurandomizers are at 12:00, Pitch at 12:00, reverb CCW, feedback CCW, etc. Then…
- Plug an audio source into In L (easiest to see with a basic waveshape), let it play for a bit, and hit freeze.
- Crank Density fully CCW, set to fully wet. You should have a nice, clear tone coming out at C3.
- Plug a patch cable into the Time CV input, with the other end unplugged. Turn the Time attenurandomizer CW.
As I understand it, plugging the cable in should disable the randomization of the attenurandomizer when turned CW. However, doing the above results in noise that sounds quite similar to the noise you get if there were nothing plugged in at all. At just barely CW of 12:00, it sounds noisy, but not quite the same. At like 3:00, it sounds pretty much identical to having nothing plugged in, except that the grains remain in mono (vs the random panning that occurs with nothing plugged in).
I’ve tried this with a dummy cable, as well as using an offset source with negative, 0, and positive voltage. The issue occurs as long as (as far as I can tell) CV + Time knob position remain within range of the Time knob (e.g. with Time at 12:00 anything outside of +/- 2.5v gives a clear tone).
This issue might also occur when grains are not firing at audio rate; it’s basically impossible to tell since minor offsets in phase don’t really affect anything except at audio rate. Testing with a very a dynamic sound source on long but sparse grains, there is no audible impact. Thus, either the problem does not occur at low grain densities, or the noise on Time is sufficiently small as to become inaudible in those cases. Actually, now that I try it with a dynamic sound source at audio rates, there is a very clear distinction between patch cable and no patch cable, so I would assume it’s the latter (that is, the amount of noise is very low amplitude).
Is this expected? Has anyone else experienced this? Is this simply a limitation of audio-rate grains given how incredibly sensitive they naturally are to tiny shifts in Time?