Mine is setup (CV LVL) as 0+5v as I found 0+10v was too higher pitch. DO I need to re-tune the TTSH for lower ranges with the MIDI2CV in mind? I tuned it using your methods.fuzzbass wrote:Minimally, your TTSH needs three CVs, pitch, gate and trigger. There is a another CV possible from the MIDI2CV for note velocity but only in Mono or Dual mode. In your build, the Gate Booster is being used to generate trigger from gate.
Gate CV is used to turn on the EGs on the TTSH. This signal should be 0V at key off, and +10V at key on. Think of this signal like a momentary switch. The EG inputs don't like in-between states. They just want On and Off.
Trigger CV is only used by the TTSH ADSR, which requires it for proper operation. It's range should be 0 to +10V, and it should be 0V at gate off and +10V at gate on. Triggers are short (2-3ms) transients that reset the ADSR cycle. Trigger has no effect on the AR cycle.
You would connect pitch, gate and trigger CVs in the usual way, and you may add a layer of modulation on top of that by applying velocity CV to either the filter cutoff or VCA gain (or ring mod or whatever). And as I said above, its going to work best if velocity CVs range between 0 and +10V, and are connected to the more linear CV inputs.
VCOs on the TTSH will respond to pitch CVs across a wide range, nearly -10V to +10V. The TTSH kinda expects 0 to +10V from the keyboard's pitch CV source and that setting is available on the Midisizer.
Its not totally clear how to set up the Midisizer from the online docs, but some things are, and others can be inferred. I recommend checking the behavior of the CV outputs as you go with DMM. I also recommend making the Learn switch externally accessible.
1. Use DIP switches 5-6 (both off) to set MONO mode.
(in Mono mode, i'm guessing CV_OUT pin 2 is pitch and pin 3 is velocity.
2. On the CV1LVL header, jumper pins 1-2 for 1V/oct and range of 0 to +10V for pitch CV1.
3. On GATELVL header, no jumper, to select +10V gates.
4. Use outputs:
Pitch CV < CV_OUT header pin 2 wire to TTSH kbd CV bus
Velocity CV < CV_OUT header pin 3 wire to panel jack for patching
Gate CV < GATE_OUT header pin 2 wire to Gate Booster GATE_IN
Ok so things are a bit clearer now. Thanks fuzzbass. You have a way of simplifying these things for the dumb asses like me.fuzzbass wrote:I think you can get velocity CV into the appropriate voltage range with the above config.
You already have a Gate Booster, but its possible you don't need one, assuming that Gate LVL also sets Strobe level. Strobe here equals Trigger on the TTSH.
1. Change the default behavior of Strobe from hi on GateOff to high on GateOn. I think this is a sysex command, but results in persistent config. You will want to test the level and polarity of the generate strobe (using a scope) and the persistence across reboots. Strobes are very quick and you won't see them on a DMM.
2. I'm guessing in the above suggested config, Strobe will be at GATE_OUT pin 3.
Gate CV < GATE_OUT header pin 2 wire to TTSH gate in
StrobeCV < GATE_OUT header pin 3 wire to TTSH trigger in
Some things I will try, Probably in this order.
1. Wire a jack (Non permanent) to MIDI2CV Velocity and try jacking that to ADSR IP.
If that works I stop screwing around.
2. Change CV LVL to 0+10v? Do I need to do I need to do this for my point 1. to work?
3. Do I need to screw around with the Gatebooster > MIDI2CV/Strobe thingy? Its working happily and I have cut a trace already.
I'm surprised no one has come up with a standard MOD for this. Velocity is SOOOOO important. At least to my mind.