XAOC PRAGA
Praga, from XAOC Devices, is a four channel voltage controlled mixer with the ability to be expanded. It contains two auxiliary sends, both with stereo returns, clickless muting per channel, and a stereo mixing bus. Praga can be switched between unipolar and bipolar modes when dealing with voltage controlling the volume. The module is also DC coupled, meaning it works great for both low frequency control signals as well as audio. Each channel contains a high-quality VCA designed to have the least noise possible. Signals can be panned either with the pan knob or by control voltage. 
PRAGA FEATURES
Intuitive volume control behaviour
Voltage control over volume and pan
Dedicated modes for unipolar and bipolar voltage control over volume
DC-coupled signal path
Channel level indicators
Two auxiliary sends with stereo returns
Clickless channel muting