2130 VCO (finally a larger VCO!)

BTG · Post by **BTG** » Sat Sep 04, 2021 8:22 am

Same, very interested!

a100user · Post by **a100user** » Mon Sep 06, 2021 12:51 am

Missed this thread, otoskope’s phaser VCO demo brought me here, looks great Tom and I agree the wave mod is a better choice than PWM.

lud · Post by **lud** » Mon Sep 06, 2021 4:34 am

Yeah I really missed the wave mod left off the newer compact vco design Vs the old blue one and ended up just sticking with old

northerntao · Post by **northerntao** » Mon Sep 06, 2021 7:17 pm

Is TZFM something that can be accomplished with a pair of the CVCOs and another module(s? Some way to add the frequency/pitch that goes past zero back as positive? If I’m understanding it correctly - FM has been way more art than science to me.

BananaPlug · Post by **BananaPlug** » Tue Sep 07, 2021 10:31 am

The perceptual thing about how we perceive low frequency, infrasonic clicks transitioning towards continuous tones, is a favorite area to explore. The chip specs say Frequency Sweep Range is a thousand to one and the module provides two 1V/O inputs, so dialing in something like 2Hz to 2KHz is doable right? Just checking.

BugBrand · Post by **BugBrand** » Wed Sep 08, 2021 4:14 am

northerntao wrote: ↑Mon Sep 06, 2021 7:17 pm Is TZFM something that can be accomplished with a pair of the CVCOs and another module(s? Some way to add the frequency/pitch that goes past zero back as positive? If I’m understanding it correctly - FM has been way more art than science to me.

No - it is either extra circuitry on the Lin FM input or, in this case, that same circuitry incorporated into the VCO chip itself.

BugBrand · Post by **BugBrand** » Wed Sep 08, 2021 4:18 am

BananaPlug wrote: ↑Tue Sep 07, 2021 10:31 am The perceptual thing about how we perceive low frequency, infrasonic clicks transitioning towards continuous tones, is a favorite area to explore. The chip specs say Frequency Sweep Range is a thousand to one and the module provides two 1V/O inputs, so dialing in something like 2Hz to 2KHz is doable right? Just checking.

I just checked this on an old proto (didn't have a production one to hand) and it turns out that in VCO mode (small timing cap) the range bottoms out at about 1.2Hz (using a negative DC offset) - so, yes, you should be good to go there.

Harko · Post by **Harko** » Sun Sep 12, 2021 11:53 am

I'm looking forward to hearing some demos!

BugBrand · Post by **BugBrand** » Tue Sep 21, 2021 8:49 am

There are some demos and details up now - check the updated first post!

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2130 VCO (finally a larger VCO!)

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Re: 2130 VCO (finally a larger VCO!)

Re: 2130 VCO (finally a larger VCO!)

Re: 2130 VCO (finally a larger VCO!)

Re: 2130 VCO (finally a larger VCO!)

Re: 2130 VCO (finally a larger VCO!)

Re: 2130 VCO (finally a larger VCO!)

Re: 2130 VCO (finally a larger VCO!)