UniSon Double Tracker : how to fully access internal FV1 algorithms ?

[eh là bas ma]

Hello,

I just read this recent thread :

Hydra delay Modulicious Hidden Reverbs , Chorus , Flanger, etc etc why pay for 1 when you can have 6 r 7 on 1xtra switch.

Just finished a hydra delay pedal a few days ago (1st smd soldering experience,nothing like the deep end and it worked !) , great sounds but was unable to get the first switch working, after investigation found no voltage (3.3v) at switch 1, rather than take it al a part again, i jumpered from...

forum.pedalpcb.com

I wanted to try it on an Unison build :

https://docs.pedalpcb.com/project/Pythagoras.pdf

I tried to add an extra toggleswitch connecting T0 to GND. Great ! It worked, but i am not sure if I get it right...

Ctrl 1 is always reverb intensity (plate reverb I would guess), Ctrl 2 is always Speed, Ctrl 3 changes according to the middle switch position :
Up = vibrato depth, Mid = Chorus depth, Down = Flange depth

I wonder if someone could explain to me how I could switch between 7 internal FV-1 programs (instead of 3, if it's even possible) on the Unison circuit, please ?

 

[phi1]

pins 16,17,18 define which patch the fv-1 is using. each pin can be at 0v (0) or 3.3v (1), making the 8 options from 000 to 111. On this pcb, pin 18 is grounded, so to access all 8, you'd have to add some other toggles add some wires off the current switch, cut a trace from pin 18 to ground (possibly under the fv-1 chip), solder onto the smd pin 18... I'm gonna say not really worth it in this case. The Arachnid pcb is setup to access 8 programs already with the rotary sw, so you could get all the internals with the pin13 toggle (also some of the 8 mode projects here run on the same arachnid pcb, like octagon and spatialist).