I’ve been working on a Hammond “Clonewheel” patch for a while and have gotten very close in sound to my real Hammond, the one issue is i’ve been having lots of nasty square-ishness, especially in the lower notes. Upon closer inspection with a spectral analyser, the Sine output from the VCV VCO isnt really a sine wave at all, and there’s significant higher order harmonic content. (see image). any idea how to fix this?
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It’s intentional, and very low in level. If you want one that is “pure” there are many.
cool, I’ll look for pure sine wave vco modules. thanks. Why would that be a feature though?
Because it’s how analog ones are. My “basicVCO” offers pure and very pure, btw…
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nice. I’ll check it out. I guess that makes sense about the analog equivalents. It is a bit funny though, a digital program emulating a poorly approximated Sin wave when it’s totally capable of making an accurate one lol.
That does look pretty clean. It’s hard to describe how obsessive I’m getting with the accuracy here though lol
In VCV Rack 1, the VCO-1 had an Analogue/Digital switch but it wasn’t carried forward
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but now we have the wt-vco with “pure” (digital) waveforms!
I challenge any VCO to have a better sine than mine. not that it’s not possible. You got any data?
I assume you know that a real Hammond is not very close to a sine. And the older they are the less they are. There’s been a lot written about that.
I was just pointing out that those kind of waveforms were not abandoned from the stock plugins, it was not a comparison 
I by no means am trying to “fact check” you, but I have a 1961 hammond, and I’ve measured the outputs from the tonewheels. A shockingly accurate sine. At least on the L-100. sure there is a little bit of crosstalk, which adds small amounts of 4th and 8th harmonic, but my old organs capacitors are a bit leaky, which filters most of that out.
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If you want good measurements, use 96 db vertical, and up the quality on the bogaudio. I only use quality “Ultra+”, but I guess it depends what you are measuring. Also, your measurement is for “sine”. I would suggest “sine clean” if that’s that you want. You won’t see a difference on the low amplitude scale, but on 96 you will see a big difference. Don’t know if it’s audible.
Oh, my bad, I wasn’t using “Sine Clean”
Also thanks for the pointers 
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ok, cool. Not what “people say”, but wouldn’t be the first time “people” were wrong. nice.
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Anyway here’s the patch I’ve been working on. Fast Leslie isn’t quite right but everything else sounds pretty close to me. VCV Clonewheel.vcv (6.5 KB)
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You are correct. As others pointed out, the old VCV VCO lost its “digital” (clean) mode and only retained the “analog” mode. Plenty of other VCO’s with clean sines though.
clean-sine.vcv (7.6 KB)
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