The neoni is special in that it drops it’s own frequency to 0 when switched to TZFM, which results in the perceived pitch being the pitch of the modulator. If you drop the pitch of a different TZFM oscillator to 0 using a large negative voltage on the pitch input, it should yield somewhat similar results.
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Let’s complicate things a bit and add gritty noise to the FM input of the oscillators and you can clearly see in the patch how they differently reflect the tzfm. But it seems that in the comment above Schabbes answered correctly why this happens ) pony&neoni.vcv (3.0 KB)
Little update!
Befaco Visit
I visited Befaco HQ in Barcelona. It was super cool to see the workshop, hear about all the upcoming projects they have planned and nerd out about gear 
. There’s some neat stuff in the pipeline, only some can be talked about so far!
Midi Thing 2 Befaco are releasing an updated version of Midi Thing (a hardware module that converts Midi to gates, CV and much more including oscillators). We plan to add VCV Rack version that will act as a bridge over MIDI, i.e. allowing 12 channels of CV from VCV Rack to the hardware.
Pony VCO Polyphonic version I’ve been working on adding polyphony to PonyVCO, there is a build available for those who want to give it a test drive: Releases · hemmer/Befaco · GitHub
This may be of technical interest as the mono version uses Differentiated Polynomial Waveforms. However it required double precision otherwise the finite difference approximation breaks down at low frequencies (the phase increment becomes tiny, and you divide by a tiny number). For poly versions to be performant we typically want to use simd but this is just float precision. So as a compromise, this version uses float_4 then switches over to “naive” waveforms below ~40Hz or so (depends on sample rate, oversampling etc). The logic being that aliasing is not an issue as there are no audible harmonics at Nyquist at those (or below) frequencies. This seems to work well but keen ears welcome.
Uh oh, DPW method with floats breaks down at lower frequencies - this is technically a square wave :S
EvenVCO hard sync The Pony VCO work is a precursor to overhauling the EvenVCO module, specifically fixing sync, which I’m very slowly working on.
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I saw the Midi Thing 2 mentioned during Superbooth and that’s got me very interested as I’ve moved back to primarily using the DAW (plus VCV plugin) to drive sequencing most things in my eurorack rather than hardware sequencing or using mostly generative modules, I’m moving back to making music more in an intentional way but with some added pseudo-randomness to keep things fresh.
Do you know if there is a release date yet?
That’s sooner than I expected. Good news, cheers!
I know that this is something you won’t be emulating (!), but their new 7U case looks rather tasty. Did you see one?
Yeah it looks great, really sturdy and io on the back. Only thing missing in my mind is an easy way to sit it at 45 degrees (like I have my mantis 99% of the time) - there’s the vesa mount but that’s overkill for just propping it up. I’m sure a 3D printed stand would work though
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I reckon it’s sturdy enough!
