My Midi DAC (original project by Robin) live for now. During three or five days I have'nt GATE from "A" out of 5668.. So, I made small correction in Arduino's sketch and change GATE channel from zero to five; now it plays stable and fine. As I think, I damaged first out of 5668.
Short video with working Midi DAC, VCA and VCO with strange Sine Out (but it sound so warm, and I don't want repair it).