Proto 1 is up and running. I can control the equalizers by I2c, the channel switching is functional, the optional voltage drop (as in marshall amps) is functional. I had to change the last gain stage to get some distorion. However I have some noise issues. The audio equalizers only accept 1~2Vmrs max, I have to rethink the gain/noise plan of the tubes and tone control.... to be continued. Here is a picture of the setup as it is now.
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