Euphonia is a hybrid digitial/analogue 4-channel mixer built around a transformer circuit developed in collaboration with Rupert Neve Designs, which AlphaTheta tells us is tuned specifically for the ...

To set the amplifier gain correctly, choose the value of R4=2R2 (double the value of R2). Diagram 1.0 shows the 3-channel sound mixer circuit using three Norton-opamps. The input levels can be set by ...