DSP Robotics Support

Hello Gang,
Here is a little device I call the de-cycler, because as you can see it removes cycles from a waveform. It can remove from 1 cycle (/2) to 9 Cycles (/10). There is also Pulse Width Modulation control, and it is effected by the knobs, pulse width and mod gain. Modulation is of course by an external source as the LFO shows. Also are two other knobs that can effect the waveform, the DC Offset knob and the Feedback knob. They seem to have a similar effect, but do have there differences. A mix knob is provided to go from original waveform to the de-cycled one or a mix of both. Last there are four modulation inputs, mix, feedback (FB_Mod), DC Offset, and Pulse Width (PWM) inputs. Well that’s it! Play around with it for a while to hear what it sounds like. Have fun, make mods or not, and PLEASE provide some feedback.
Later then, BobF…..

Getting some interesting tones, cool!

Fascinating idea Bob. You do come up with some good ones!

The resulting waveforms remind me of glottal sounds; you get an impulse cycle followed by a period of silence, and here you can alter the ratio without having to make new individual waveforms. This would make a nice basis for vocal sounds, with appropriate resonant filtering following on for the formants.
You could maybe correct the pitch relative to the division ratio selected too, so the apparent fundamental pitch is retained. Nice!

It’s very rare to see a new type of “oscillator” these days.
Very inspiring and thanks for sharing.

Cheers

Spogg

very interesting

Ooh, that's very interesting - it gets some harmonics out of the source wave that I'd never have predicted, and much more musical than I'd have guessed the "waveform chopping" would be. Using logic gates within an oscillator like that is a fascinating idea, and one with plenty of room for new experiments (e.g. keep cycles [n1, n2, n3, ...] out of every N, or splicing a different oscillator waveform into the gaps, etc.)

I've had some fun playing my bass through it, too. The new harmonics that are added sound rather like having a "second oscillator" tuned to a harmonic of the original pitch. Using 'tanh' to soften the plucking transients a bit, it's a very playable and musical sound; more stable than some pitch-shifters I've tried doing "auto-chord" effects with, and with it's own unique "synthesised" timbre (as I said to Spogg recently, I love anything that lets me use my bass, rather than my terrible keyboard playing, to drive new sounds!)

Spogg wrote:You could maybe correct the pitch relative to the division ratio selected too

Or even sequencing the division ratio. If you flick through them quickly, you can make little tunes out of the way that the pitch centre changes - rather like holding a note on a organ and 'playing' the drawbars.

trogluddite wrote: ... splicing a different oscillator waveform into the gaps, etc.)

I've already been there and I have the tee-shirt to prove it

viewtopic.php?f=3&t=9639#p36399

Of course it doesn't have a live audio input, so no good for processing bass. But you can at least assess the sounds...

Cheers

Spogg

^ Nice one, Spogg! I'll definitely be having a play with that - some very cool sounds (and looks) in your video demo!

To Trogluddite,

Here is one you may like for your BASS! It divides a waveform in half.

Also I did this sometime ago,

Trogluddite wrote:
... or splicing a different oscillator waveform into the gaps

Cheers, BobF.....

Thankyou, BobF - I'm being spoiled with new toys to play with since I came back!

Thanks for this Bob