Helios-One Arduino Synth - Part 3.1 - Minor Updates

**Update**

The full build guide is now available here: 

**End of update**

I made a few small changes to the V3 code;

https://github.com/gary909/Helios-Arduino-Synth-V3.1

V3.1 - Minor Updates

*Improved Filter Resonance (?). Apparently After setting resonance, you need to call setCuttoffFreq() to hear the change. Swapped in code.

*Increased note sustain from 10 seconds to 60 seconds

*OSC OUTPUT made louder on audio update>>9; // changed down from 10 to 9 because was louder

Still working on the LFO section, hopefully not too much longer...