Trouble Calibrating With A Qunexus
Posted: Sat Jan 16, 2016 12:22 pm
Hello All,
I have a brand new Werkstatt, a CV expansion, and a Qunexus and a Qunexus cable kit. I am currently trying to get it all calibrated.
I have the Qunexus connected to Gate out and VCO Exp FM In
I tuned the VCO pitch to play G3 when I hit the lowest key on the Qunexus keyboard. Hit the Octave button 3 times, adjusted the trim pot, and it plays really close to G6. Come back down, and it plays G3. The intermediate steps are not G4 and G5, though. Here is some data
Octave Open Circuit Voltage, V Frequency, Hz Note
1 0.019 196 G3
2 1.011 494.5 B4
3 2.005 622.5 Ef5
4 2.999 1566.5 G6
This is repeatable within a couple of Hz, even overnight. Should the frequency go 200, 400, 800, 1600 Hz?
The voltage is measured with the jack out of the CV expander, if I measured while it was in the expander, it seemed to effect the tuning of the Werkstatt--maybe G3 became E3. Voltage was measured on a brand new BK Precision DMM, should be pretty accurate.
Fequency was measured using an APP for my iPad called Cleartune. Tried it with the microphone and then using an iRig2--G6 annoyed the cat and the girlfriend.
Any obvious mistakes? Any suggestions? Anyone else try this?
I guess the first suspect would be the frequency measurement. Any suggestions for a better instrument?
Thanks!
Trevor
I have a brand new Werkstatt, a CV expansion, and a Qunexus and a Qunexus cable kit. I am currently trying to get it all calibrated.
I have the Qunexus connected to Gate out and VCO Exp FM In
I tuned the VCO pitch to play G3 when I hit the lowest key on the Qunexus keyboard. Hit the Octave button 3 times, adjusted the trim pot, and it plays really close to G6. Come back down, and it plays G3. The intermediate steps are not G4 and G5, though. Here is some data
Octave Open Circuit Voltage, V Frequency, Hz Note
1 0.019 196 G3
2 1.011 494.5 B4
3 2.005 622.5 Ef5
4 2.999 1566.5 G6
This is repeatable within a couple of Hz, even overnight. Should the frequency go 200, 400, 800, 1600 Hz?
The voltage is measured with the jack out of the CV expander, if I measured while it was in the expander, it seemed to effect the tuning of the Werkstatt--maybe G3 became E3. Voltage was measured on a brand new BK Precision DMM, should be pretty accurate.
Fequency was measured using an APP for my iPad called Cleartune. Tried it with the microphone and then using an iRig2--G6 annoyed the cat and the girlfriend.
Any obvious mistakes? Any suggestions? Anyone else try this?
I guess the first suspect would be the frequency measurement. Any suggestions for a better instrument?
Thanks!
Trevor