MIKROSUM S MIX32 current state of the project

Hi!

In the last months and weeks I've been busy redisigning the boards of the summing mixer. After some feedback received through some online forums, I decided to simplify somewhat the design, while keeping  the most important features equal. These changes imply simplifying the audio circuitry, saving parts and power consumption. In that sense, I decided to eliminate the line driver output, and just keep the transformer output, that people preferred over the line driver, because of its "glueing" effect on the mix.