[sdiy] MIDI2CV & Arpeggio question..

[Florian Anwander]

Bonjour Jean-Pierre

> I'm sure this question has been asked earlier somewhere..
>  I'm about to build a MIDI2CV module and I'm at the very start.
>  I'm wondering what will be the actual MIDI note that will
>  produce 0vdc at the pitch CV output ? (CV out is 1V/oct)
>  What I need to know is: 
>  Is-it C3, C2.. C0, A0, A1 ?
>  And what is the "standard" frequency for that 0vdc note ? 
There is none. For keyboards, the lowest possible key of the keyboard 
usually provides 0V. For most of the Roland SH-Series this is an F! 
MIDI-Interfaces usually provide 0V = C. Since most MIDI-Keyboards get 
not further down than MIDI note #36, you might take this note as 0V.



> This MIDI2CV will have an ARPEGGIO option
> that when selected will 'scan' the present pressed MIDI notes.
> I have 2 options in my ARPEGGIO programing:
> -Scanning the notes starting at the oldest and ending with the newer note.
> -Scanning the notes starting at the lowest MIDI note pressed
>  and ending with the higher MIDI note pressed 
>  (refreshing the in between modified notes).
> What do you think.
Do both (and do it inverted too: news->oldest and highest->lowest)

Cordialment Florian