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Full Version: Which voltage is or should be which note?
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Hi forum,

in another thread a fellow NerdSEQ user wrote:

Quote:Not to mention setting up the midi offset because [the Elektron Analog] Rtyms [MkII] C-0 is (IMO) really C-1


That made me rethink my anchoring of notes. For notes both local CV as well as on the CV16 I use bipolar mode (-5 - +5) which means C-0 gives -5V, C-5 gives 0V and C-A results in +5V. Since most of my VCOs are tuned such that 0V yields C (~64Hz) my tonal material is mostly in the range from C-5 to C-9. In that scale middle C is C-7 and Kammerton A @440 Hz would be A-7.

That's all fine as long as I'm in the realm of my VCOs.

I have yet to start using MIDI with the NerdSEQ (waiting for the USB MIDI adapter; I'm not into gamepads but do own a lot of USB MIDI gear). But this leads quite obviously to the question:
Which MIDI note (as in Note# as of the MIDI protocol) results is which Note as of the NerdSEQ?

Or phrased differently:
MIDI Note# 69 (Kammerton A - 440Hz) results in which Note in the NerdSEQ MIDI Pattern Screen?

As a consequence I may or may not wish to retune my VCOs or find solution to align my MIDI gear and my VCOs (in case there's a discrepancy)

What do others do or use?


Kind regards,
Michael
(02-23-2021, 04:29 PM)mgd Wrote: [ -> ]Hi forum,

in another thread a fellow NerdSEQ user wrote:

Quote:Not to mention setting up the midi offset because [the Elektron Analog] Rtyms [MkII] C-0 is (IMO) really C-1


That made me rethink my anchoring of notes. For notes both local CV as well as on the CV16 I use bipolar mode (-5 - +5) which means C-0 gives -5V, C-5 gives 0V and C-A results in +5V. Since most of my VCOs are tuned such that 0V yields C (~64Hz) my tonal material is mostly in the range from C-5 to C-. I that scale middle C is C-7 and Kammerton A @440 Hz would be A-7.

That's all fine as long as I'm in the realm of my VCOs.

I have yet to start using MIDI with the NerdSEQ (waiting for the USB MIDI adapter; I'm not into gamepads but do own a lot of USB MIDI gear). But this leads quite obviously to the question:
Which MIDI note (as in Note# as of the MIDI protocol) results is which Note as of the NerdSEQ?

Or phrased differently:
MIDI Note# 69 (Kammerton A - 440Hz) results in which Note in the NerdSEQ MIDI Pattern Screen?

As a consequence I may or may not wish to retune my VCOs or find solution to align my MIDI gear and my VCOs (in case there's a discrepancy)

What do others do or use?


Kind regards,
Michael

Basically that is the point he wrote in his thread. You can set a fixed offset with the input note to fix all offset issues out there with Midi. This might sound funny for some, but there is no really definition of if a 60 should be a C-5 or C-4. And different music softwares and keyboards use different octaves.
The input offset/compensation fixes this completely and if you are used to get a C-4 in ableton live for this tone, you can just set it like this to be equal.
And in your case you can easily compensate a few octaves and get a similar result.
And for what it's worth with midi tracks, you can also compensate it's output if needed.
I actually don't have right now out of my head the octave that will appear without a compensation. It should probably be A-5.