856 for ZELLERSASN



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Re: 856 for ZELLERSASN

Postby hotfat » Mon Dec 31, 2018 4:28 pm

Anybody quantified or measured the Fine Tuning parameters via MIDI CC? Documents say range is +/- 100 cents but there are only decimal values 0 through 127 available. Supposing a CC value of 64 would equal "0" or exact pitch, CC value 0 is -100 cents and CC value 127 is +100, what are the increments between these? Roughly 2 cents?
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Re: 856 for ZELLERSASN

Postby joshuavt » Wed Jan 02, 2019 7:49 pm

Thank you!
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Re: 856 for ZELLERSASN

Postby hotfat » Thu Jan 03, 2019 5:03 am

According to my measurements using a Peterson VSII digital strobe tuner and an A 440Hz sine wave, it appears that the "Fine Tune" parameters allow -55 cents to +46.5 cents adjustment (not -100 to +100 cents) in 16 fairly coarse steps as below:
Midi Value Cents
000 002 -55
003 011 -48
012 020 -41
021 028 -34.5
029 037 -27.5
038 046 -20.5
047 055 -13.5
056 062 -06.5
063 071 0
072 080 +06.5
081 088 +13.5
089 096 +20.3
097 104 +26.7
105 113 +33.5
114 120 +40.2
121 127 +46.5
The parts after the decimal points are just an approximation as the strobe tuner didn't have that resolution.
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