Molten Modular's CV and Audio Utility / Realtime Visualizer
Motion MTR allow you to mix, attenuate and invert signals while having clear visual feedback of their levels. Each channel can function as:
Each input is normalled to 10v, so you can use each of them to generate fixed voltages. Also, the outputs of channels 1 and 2 are summed into Out 3 to be used as a mixer. Patch it wildly to make it work as an attenuverter with offset, as a mixer, a VU meter or a combination of them all!
https://moltenmusictechnology.com/molten-motion-meter
https://www.befaco.org/motion_mtr
Available as an assembled Module and as a DIY project.
This Module is currently available.
$185