Got my Hermod+ … no time on the weekend, but testing today, very nice so far.
However I was surprised that output CV calibration was relatively far off - I had the impression things were very slightly out of tune (with a digital VCO, so no temperature drift).
So I started the calibration procedure to verify the output voltages. All 8 voices needed substantial calibration, voltage was sometimes nearly 0.02 Volts off, which is about a quarter tone … but not consistently, some voices and some voltages needed more, some less adjustment.
I have a calibrated Voltmeter (BM 859s) with 5 significant digits and < 0.02% error, so precision should be fine for calibration.
Some questions:
Is each Hermod+ individually calibrated in the factory and I simply had bad luck or is the initial calibration necessary and expected?
Any recommendations if and how long the module should “warm up” before performing the calibration procedure?
I calibrated my Hermod+ yesterday, and was surprised that it basically seemed uncalibrated, that’s is all correction values were 0.
I had to stop the process half way though and was surprised that although the values I already entered were remembered, my meter told me that already calibrated outputs was off about 7 calibration clicks, hmm…
Although it took a while to go through the process I was pleasantly surprised to discover that the track led/buttons made it easy to jump between the outputs, hence allowing me to pick up where I left.
The calibration procedure is really well designed. I appreciate that Squarp suggests you can improve performance by just going ahead with calibrating it, and made it so dead simple to do so. Now I can’t live without the dead-on accuracy and the rest of the pitch quantizers in my system sound like hot garbage.
I think it could be better. For example it would be great if you could use the calibrated inputs to enable auto calibration for the outputs, rather than having to spend 20+ minutes doing it the current way.
Instead currently you auto calibrate the inputs with the outputs.
+1
I have received my Hermod+ and it seems to be at least one semitone off. Also having Mordax Data and no experience with calibration, I’m pointing to this question too.
Anyone helps please? Thank you
FYI (and for those struggling about the same topic)
I’m just in the middle of calibration process, so far so good and Mordax Data seems to be more than enough for calibration process
So I managed to calibrate my new H+, but what’s odd is that for me to get a middle C i.e. C4/ 262 Hz (as shown on the Hermod screen) from my oscillator, I need it tuned to C5/523 Hz? Is there some kind of octave transpose switch activated somewhere?
My prior experience is with an USTA which generates only positive voltage, which I interpret as ‘offsets’ from my base note, yet from this calibration it’s clear H+ gens negative voltages, so I’m not sure what it expects my oscillator to be tuned to?