Little Phatty CV OUT MOD pitch problem

sencha · Post by **sencha** » Sat Jul 13, 2013 1:32 am

I've got a Little Phatty with CV OUT mod. When I control my analog equipment with CV/gate with the Little Phatty's keyboard, I noticed that the pitch CV OUT is not good. For example when I press the C key on the LP, the note produced on the controled synth becomes a G# and not a C.

It's not a problem of 1V/oct scale because the tracking is excellent but there is just a difference of 4 tones and a half relative to the reference note pressed on the keyboard. I don't have this problem when I use my MiniBrute to control the same CV/gate synths, a C is a C (or any other notes of the keyboard) so the problem comes from the Little Phatty, no doubt about it.

What's the problem ? Is there a trimmer or something inside the Phatty where I can adjust the offset ? Can I fix it myself ?

Thanks.

stiiiiiiive · Post by **stiiiiiiive** » Sat Jul 13, 2013 5:21 am

Salut Sencha

I experimented that with CV in general and often solved by pressing a key on the controlled synth, just to set a reference. So the synth you're trying to control has a keyboard, you should try to press a C before sending CV in it.

On a side note, more recently, I've been told that some F-F keybed equiped synths have an F as reference for the pitch. Consequently, controling them through MIDI necesitates to consider a 3 1/2 tone offset.

J'espère que ça t'aidera

sencha · Post by **sencha** » Sat Jul 13, 2013 7:03 am

Merci stiiiiiiive

Unfortunately it doesn't help !
The only way to resolve temporaly the problem is to use the Offset of my CP-251 but it's not normal that I need an external device. The VC OUT modification was so expensive, I'm a bit upset that it doesn't work properly ! I don't understand, each time I had problems with CV/gate connections it was always with (modern) Moog gear... Sorry that I have to tell this here... !

enossified · Post by **enossified** » Sat Jul 13, 2013 9:27 am

Unlike MIDI, CV has no fixed pitch reference.

You are not the first to post here with this issue, perhaps others who have experienced it will chime in.

sencha · Post by **sencha** » Sat Jul 13, 2013 7:13 pm

Unlike MIDI, CV has no fixed pitch reference.

Sure but then why my other keyboards equipped with CV/gate outputs, such as the Arturia MiniBrute or vintage synths, are factory set to produce the good pitch reference and not the Little Phatty ? When I use these keyboards to drive a CV/gate synth or a VCO from my modular, the note will be the same than the key pressed and not a difference of several tones.

stiiiiiiive · Post by **stiiiiiiive** » Sat Jul 13, 2013 7:45 pm

What is the controled synth, BTW?

sencha · Post by **sencha** » Sun Jul 14, 2013 1:52 am

Oberheim SEM, Doepfer Dark Energy, Make Noise DPO, MFB Kraftzwerg, etc...

sencha · Post by **sencha** » Sun Jul 14, 2013 5:09 am

This morning, the CV Gate OUT doesn't work anymore, impossible to trigger the envelopes of my external CV/gate synths.
That's a shame, bad China quality I guess. I'm more and more disappointed by Moog.
I finally add this (expensive) CV OUT MOD for nothing... I am really furious !

stiiiiiiive · Post by **stiiiiiiive** » Sun Jul 14, 2013 6:47 am

Sorry to hear that, mate

I hope it's still under warranty in which case you can get it fixed. Contact Moog support and/or MESI, my best piece of advice.

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Little Phatty CV OUT MOD pitch problem

Little Phatty CV OUT MOD pitch problem

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