Scanning Mixer

Scanning Micer: Front view
Scanning Micer: Front view

This scanning mixer is derived from the work of J├╝rgen Haible and Don Tillman with a lot off additions, changes and expansions.. The mixer is able to scan through four inputs with variable depth ans position. Manually and CV controlled. You can overdrive the individual channel nicely to add some overtones per channel. Rate, depth and scan amount are voltage controllable. The mixing level is controlled with sliders and voltage controllable as well. The four channels are summed into an output channel with similar controls.

The scanning mixer comes in two flavours linear and logarithmic. The linear scan gives a more smooth transition between the channels. The logarithmic scan gives a steeper separation between channels. All channels are DC coupled. So you can get interesting slowly moving CV textures when slowly scanning through different LFO outputs. When the depth potentiometer is set to zero you can use this module as simple voltage controlled mixer

Specs and features

  • Four input channels
  • DC coupled
  • Overdrive per channel
  • Variable scan depth and position
  • Voltage controlled rate, depth and scan amount
  • Mixing level voltage controllable
  • Power consumption below 80mA each rail

The documentation and the Gerber files for download can be found in my website.

There are to much schematic to post here. Please refer to my website. Only pictures here.

Scanning Mixer: Control PCB top
Scanning Mixer: Control PCB top
Scanning Mixer: Control PCB back
Scanning Mixer: Main PCB 01 lin
Scanning Mixer: Main PCB 01 lin
Scanning Mixer: Main PCB 01 log
Scanning Mixer: Main PCB 01 log
Scanning Mixer: Main PCB 02
Scanning Mixer: Main PCB 02
Scanning Mixer: Half front
Scanning Mixer: Half front
Scanning Mixer: Back
Scanning Mixer: Back
Scanning Mixer: Side
Scanning Mixer: Side