XOR Userforum

Hi FirestARTer, 

 I'm running 1.17, although noted same issue in previous fmw - the output note from all CVn outputs would be the same, until I hit a very high pitch like C6, then would get good tracking to C8.  Everything below C6 or so would give a constant voltage, C0-C6.   Different oscillators, all checked out OK, notes below C6 would come out of the oscillators, if driven by a CV keyboard, Rene, etc.   So the issue was with what was coming out of CVn.  To sum, a constant voltage below C6, then linear tracking to about C8.

So I checked the power supply (same supply as was driving the Rene), verified good 12V.  The nerdseq itself always starts up, nice bright solid screen, no flickering, all triggers nice and the right rates.

I started the calibration routine in the manual, but don't see anything like 0 and 10V (switch left, switch right) at CV1,  more like 11.2V left, 11.4V right, and NO change at all when turning the trimpots at rear.   This is with the CV1 offset value in the menu set to 0010.   Changing the menu value has no effect on the measured voltage either.  Two different multimeters used, same result.

Are there some test points for voltages I should be checking first?   Thanks very much, KevinC / minphase

Hey,
i will get into detail in my next message as i am short in time right now.
Are you sure you don’t have any automators with offset turned on or
something like this? Any FX on? Global transpose off?
Also cv values in the calibration should be like 0006 for the 0 volt range and
Something between 3700 and 4094 for the 10 volt range.
You only set the potmeters on the back when you are on the 0
Volt cv1 with 0006 and set the potmeter until you reach 0 volt ( or -5 for the switch left), measuring on the CV1 output.
If you are at 0 volt, you go to the next row cv1 (10V) and change the value until you measure
10 volts.
Same for the other outputs, you don’t touch the potmeters again.

Will double check re automators and global fx. Don't think so, not running any patterns, fresh start up after firmware upgrade.

Yes, starting with default values:
CV1 offset = 0010 AND
CV1 range = 3800-ish

Initial reading at CV1 is 11.5 VDC with switch to right, 11.2 with switch to left. Changing CV1 offset value in the menu from 0-to-hundreds had no effect.

Should I be starting with initial condition CV1offset=0006, CV1range=0000 ? Or is it the fact that the cursor is on line CV1offset that forces only that single parameter to be effective?

Warm regards, KC

Hey KC,

this sounds then like a hardware issue. Do you have the same issue with the MOD outputs?
I will contact you directly as this is not bug related and neither firmware but more a support thing.

Hi Thomas, list,

Update: switching cases and power supplies seems to have cleared this. The PS I was using was a Cell90 skiff, nerdseq all alone. That should have been sufficient, but I don't much trust that particular skiff.

Seeing expected >5 octave range of CV note outputs with the good case/power supply. My calibration if off now, but will redo the procedure now I'm starting from a good known state. Thanks for help, firestARTer!

Best, KevinC