YARNS - 1v/oct input in oscilator


#1

Hi Guys,

Is it normal that when plug cv out of yarns to VCO it changes the pitch of my VCO up to 4 octaves?

I had 440hz and after plug in the cable there was around 1760.

Behavior is present for any cv out.


#2

When you power the module on, before it ever receives any note, it defaults to a C2 (+2V). This transposes the note by 2 octaves, so if your VCO is tuned to 440Hz, it’ll play at 1760Hz.

You’re doing the maths wrong by the way. The ratio between 1760 and 440 is 4 indeed, but it doesn’t mean that 1760Hz is 4 octaves higher than 440Hz. You have to take the log2 to get the number of octaves (log2 4 = 2).


#3

Thanks for help! Can this be changed?


#4

Set “TT” in Yarns to “-24” and save the program in memory slot 1?


#5

Why is it a problem? At some point you’re going to send a note and Yarns will send the voltage corresponding to that note.

And if you’re never going to send any note… why using Yarns?


#6

On that note, I was wondering why so many cv keyboards are tuned to low C as their 0 voltage note? Is it established somewhere or ir it just a convention?

I got in the habit of tuning to low A for patching with Audulus just because it’s a nice round number of Hz.


#7

Someone mentioning 432Hz in 3… 2… 1…


#8

Yeah that’s a kind of informal standard.


#9

I had to google that, MIND BLOWN.


#10

Here’s a nice article:

https://learningmodular.com/matching-octaves-in-your-modular/

Note that I chose 2.0V at MIDI note 60 because this is what my Doepfer MIDI interface provided. “In Eurorack-land do as the Doepfers do”.


#11

A post was split to a new topic: Yarns