Hello friends,   I am new in this forum and I am right of I found the ideal place to obtain help,   I notice that aquà has people very understood in the subject.   I am building an alaog monophonic synth with 37 keys,   MIDI Keyboard with Velocity sensing   with a total of:   30 potentiometers   13 SPDT on/off/on toggle swithces   7 rotary switches 1pole 6 positions   2 rotary switches 1pole 4 positions   (See circuit in included PDF)   I can implement my synth with a sytema MIDI and with presets memory using a MIDIbox.   I need to know which MIDIbox is more appropriate to my project,   MIDIbox CV or MIDIbox64.   Thanks    See my diagram in block below MIDI Analog Synth.pdf