I want to bring to your attention the prototype sound synthesizer ETHERSYNTH. Control by the microcontroller, as in modern synthesizers, because of the possibility of reception and transmission of MIDI messages via the USART, the controller memorize settings, free routing control signals, generating LFO various purposes. I chose the one already used in previous projects ATXMega128A1 and development environment IAR. To control voltages using PWM outputs with a low-pass filter, it turned four: first, - "pitch cv" to control the height of the main generator of the notes; secondly, - "cutoff cv" to control the frequency cutoff; Thirdly, - "amp cv" for controlling the output gain; Fourthly, - "pulse width cv" pulse width for the PWM control signal generator rectangular. As the controller generates two ADSR envelopes, which can be assigned to any of the control output. All parameters are set via MIDI. In addition Wi-Fi module inside to send MIDI messa