After some perseverance with the Sh101 seq I got it to work properly, you were correct about it expecting the gate signal. I took gate also from the ribbon (as well as voltage to record). Which meant it went into record each time you press the ribbon but it sounds cool, the loop points are a great feature!
I got the LED working on pin 3, attached led leg to 0v somewhere else on the NS1 and it will light when gate input to A3 is high. Pin 4 is gate out (to envelope gate in) My LED was way too bright but it was cool to see it working as meant to.
Bouncing ball next, love that! Do you know Eric Archer.net? He makes circuits like these only using Op Amps and through hole perfboard components, 70s tech. No ucontrollers. Impressive, steep learning curve however : )