BBMIXER: a DIY Rotary Mixer

I finally got my DIY Rotary Mixer working, and I’m quite happy with it!

It has 2 lines, a PFL, individual and Master gain, and a High-Pass filter for some isolator-like action.
I also found some inexpensive backlit retro style analog Vu-Meters.
All impedances are dealt with using TL072 op-amps.

Here it is in action:

My next step is adding one HP Filter per channel..

Here are a few pictures from the build:

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