[sdiy] analogue guitar type controler thing

[Tom May]

"Dominic Tarr" <dmt10 at waikato.ac.nz> writes:

> >course its kind of expensive but wiring up doepfer's ctm64 to a fretted neck
> >would probably yield something like an old peavey midibase (fretwired for
> >fast tracking)
> 
> yeah too expensive/ not uber-diy enough for me.
> 
> >but using metal strings with the fret contacts, wouldn't that cause some
> >sort of shock to the player?
> 
> with a low voltage and current the player would be fine. have you every shocked your self from a 1.5V battery? it's not possible.
> 
> >If you use real metal strings on a real guitarneck, you have
> >exellent switches. Just wire up the frets and figure out a way
> >to check what the highest fret touched is.
> 
> thats a really good idea, to get the highest fret you could prehaps do something like the following:
> 
> have a railf diodes connecting all the frets, (from highest to lowest) through not and and gates... so the "higher fret" signal goes through a NOT gate, then into one input of a AND gate, and the signal from the fret goes into the other leg, the output would then go to the lower frets through the diodes, and to the CV generation -- just resistors? what would be the easiest way to accurately get a number of signals into thier correct levels? trimpots?
> 
> then the buttons down the body ("the strings")could have bistables or some thing, so thier note stays the same, but you can still do slides with the frets after you have released the note...

I don't really follow what you're thinking, and I would like to see
something like this working, but wouldn't you need to press six
separate pieces of fretwire into each fret slot (and figure out how to
wire to them), and use a non-metallic bridge, to keep the whole mess
from just shorting together when you play notes on more than one
string? And are you planning on using a wired pick to trigger notes,
or a piezo bridge pickup, or?  And fret buzz will probably be an
issue.

Tom.