Drones_4_wave_X is a Drone synth with 8 oscillators for Arduino Nano Based on https://github.com/SoundCodes/8knobs
Helios_Drone5_0 merges BlogHoskins Helios sketch with the Drones sketch. It needs two extra pots on A6 and A7, and an additonal switch on D4 to switch between Drone and Helios modes.
Helios_Drone5_0a is a 6-voice version of the same which will run on the standard Helios with any additional pots or switches. The position of the LFO switch sets the unit into either Drone or Helios mode at startup.
Helios_Drones5_1 adds sustain and release to the Helios envelope using the extra pots on A6 and A7.
Helios_Drones5_2 improved implementation of sustain and release on the Helios envelope using the extra pots on A6 and A7.