Sysex Positive Negative knob shows 0 but synth shows -1

Question

MIDI Target Manufacturer(s): Korg

When using negative & positive sysex values such as for detune or interval, the zero point sends 7F 7F instead of 00 00 when increasing from -3 towards 0, but works properly when going from 3 to 0. When my control knob in MIDIDesigner is showing zero, my synth parameter on the LCD shows -1.

I used instructions at the link below to make my supercontrol and subcontrol knobs.

http://mididesigner.com/qa/3854/positive-and-negative-values-63-to-63-e-g-pan-controls

How can I get 0 coming from both - and + side of the knob instead of having to twist past the zero point into the positive area on the knob, then turn back counterclockwise to get the synth and knob to both show 0?

Comments

if you could kindly move all the controls (2?) to a single page, save that page and then upload it here I could figure it out more easily. Or just send it via email (email page) to support [at] mididesigner.com and reference this ticket (qa5528).

Thanks!
Dan

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Saw the mail come in, going to tend to some other user issues -- uploads! -- and then circle back shortly. Thanks!

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Thanks. I am working through this based on your answer.

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Very cool, thanks!

Answer 1

The issue is that the supercontrol "START LVL" needs to be a of a MIDI message type that supports more than 128 values. Easiest thing to do is set it to NRPN (0-16K). You could use sysex, but then you'd need to add a V in the sysex string and THEN set the number of bytes to 2.

Thanks!

Downloads: 205
Diagnostic Layout - "I cannot seem to get the thing zero' out on mididesigner and iPad at the same time. I need these to control envelopes on my M1 Korg. Thx for your attention. FWIW I am trying to get a reset button working, too to reset envelopes to zero but you can ignore"
Downloads: 205

Answer 2

The issue is that the supercontrol "START LVL" needs to be a of a MIDI message type that supports more than 128 values. Easiest thing to do is set it to NRPN (0-16K). You could use sysex, but then you'd need to add a V in the sysex string and THEN set the number of bytes to 2.

Thanks!

Downloads: 205
Diagnostic Layout - "I cannot seem to get the thing zero' out on mididesigner and iPad at the same time. I need these to control envelopes on my M1 Korg. Thx for your attention. FWIW I am trying to get a reset button working, too to reset envelopes to zero but you can ignore"
Downloads: 205