transforming a sustain pedal into an on/off switch?

[bosone]

i have recently bought a double sustain pedal originally build for the piano (with two pedal identical to the sustain pedal of the piano, even in the "feel").
as i was waying, they are two identical sustain switch: i press one and a CCx=127 is generated. i release and CCx=0 (where x depend on my masterkeyboard!).

with scope, is there a way to transform one of these pedal in an on/off switch (like a guitar fx pedal)?
i'd like to: press the pedal once and generate CCx=127. then, when i release, nothing happens.
i press the same pedal another time and a CCx=0 is generated. again, when i release, nothing happens.

(hope it ii clear!)

[at0m]

You can link that CC# to any switch on synths or modular patches... (for example distortion bypass, delay send, etc)

[bosone]

no, that's not what i have in mind.
in that way, the switch simply follows the pedal state (down=on, up=off).

i want (pedal/CC switch)
down=on
then up=nothing
down again=off
then up=nothing
down=on
then up=nothing
down again=off
then up=nothing

etc
like what happens with a pedal fx (boss distortion for example)

i need something with a "latch"...

[wolf]

I think you mean a toggle switch. You can do this e.g. in modular by making a flipflop out of two OR or AND modules, where the ouput of one goes to the input of the other. You could also use a sample&hold module, which reacts on a high->low flank.

[Michu]

if you happen to have flexor,
then frequency divider does what you need (it is flipflop switch),
you'd need to attach CC to constant val or val monitor, then route it to freq divider and then use it to control something or route it to val monitor assigned to CC (if you want CC out)

[bosone]

thanks for the flexor advice!
i'll try as soon as i come back home!
otherwise, i have to remove the dust from my electronic books and see how to realise a flip flop!

[bosone]

thanks...
it works perfectly!