DESCRIPTION: This is the final version of my digital VCO for modular synthesizer I am building.The VCO is double, but mixing waves takes place on the programming level. Blue displays showing the corresponding wave bank, red - the LFO bank, and green (not demonstrated) phase shifting. Lower yellow switch turns on the LFO, the upper one synchronizes switching of both banks. The VCO have been built using Xmega256A3U with 32MHz clock and it's DAC output.