Felt Orbit ORHACK demo v24

Based on v23.

Changes:
- Suppressed the Samplemento voice's startup "Gate mode" stdout message.
  The bottom line can now start directly as "Sustain: Off".
- Sustain state is also sent to the module AUX LED output:
    Sustain Off -> LED 0
    Sustain On  -> LED 1

About LED colour:
This module interface exposes aux-led-$1 as a single scalar value, not RGB.
So the patch can switch/dim the AUX LED, but cannot select a warm-yellow hue
through this interface. No unsupported colour hack was added.

Audio/release/latch/sample length/parameters otherwise unchanged.
