# Hertz to volts conversion?

There didn’t really seem to be a right place to put this.

I want the 8FO to complete a cycle over 4 bars @86bpm. The calculation needs to be in hertz to enter into the 8FO’s frequency. As it will include a Logarithmic calculation I need help. I know there is a BPM LFO but I want to use all 8phases of 8FO to modulate the harmonics of Chevyshev and DBiz harmonic generator so using the BPM LFO won’t do it.

(16 beats)x(1 minute/86 beats)x(60 seconds/1 minute)=11.1627907 seconds

1cycle/11.1627907seconds= 0.089583333333333 cycles/second

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From https://vcvrack.com/manual/VoltageStandards#pitch-and-frequencies, f = 2 Hz \cdot 2^V for LFOs with their frequency knob at its default position. Solve for V to get V = log_2(f/2Hz). Use @dronehands’ result for f.

However, you can set the Hz directly on most LFOs, so knowing the voltage is unnecessary, unless you want to control the LFO with another module.

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Thanks Droneheads. That was the same calculation that I did. but it was still way too fast. Shows we were (almost) thinking on the same lines.

Thank you Andrew.

That’s exactly what I needed.

Now all I need to find is my scientific calculator, which I haven’t used for around ten years.

I really appreciate it

Dave

Just use Google. Rack v2 will be able to evaluate expressions entered in parameter text fields.

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An easier way would be (86bpm / 60sec) / 16cycles / 4bar = 0.0223958Hz

Trim LFO has a BPM version. You can adjust the tension screws to get 86 bpm and it is just a matter of increasing / decreasing the main value which will snap to multiples of 0.5.

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for me the easiest way would be to use the AS BPM/Hz module

then I use the Note setting 1: 2791 ms. = 0.36 hz I’d divide the hz or multiply the ms by 16 (if you have a 4 beat/bar)
and that should give the needed speed for the lfo = 44656 ms = 0.0225 hz (which is roughly = 0.0223958 )

but I’m in no way scientific or have any mathematical knowledge,
maybe I’m wrong with doing my math here

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The only thing with that is the accuracy of 0.36 Hz it does not equal a full bar for 86 BPM. 0.36 is about 86.4 BPM over 4 bars over time this would be miles out of sync. Even a 0.001 BPM deviation would be out of sync over time.

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yep, you’re right, but for a quick test it may work

so it would be better to use 0.358294518093 hz for 1 beat. which makes = 0.0223934073808125 hz = 44656.00000010 ms

but the values might be a bit different depending on how the calculators work