4ms QCD expander

The QCD Expander is an expansion module for the Quad Clock Distributor (QCD).

The QCD Expander adds a host of features, turning the QCD into a programmatic non-linear sequencer. Each channel gets a CV Trigger Delay (Pulse Width) jack and knob, an additional output jack with three selectable modes, and attenuverters for all CV input jacks. Self-patched evolving rhythms and swing/shuffle patterns are easily obtained, as well as complete control over standard rhythmic patterns.

Basic features:

• Connects to QCD module with a 16-conductor ribbon cable (included)
• More features are added to each QCD channel:
  • Multi-mode output jack INV OUT mirrors the tempo of main QCD output
  • Mode Switch for each INV OUT jack:
    • Delayed Trigger Mode
    • Inverted Gate Mode
    • Shuffle Mode (delayed + original trigger)
  • PW/Delay knob controls trigger delay time on INV OUT jack (or pulse width in Inverted Gate Mode)
    • Also controls Pulse Width of main QCD OUT jack
    • CV input jack for external control
    • Attenuverter allows for one channel to precisely modulate another channel's delay or pulse width
  • Div/Mult CV attenuator knob
    • Controls how much the signal on the main QCD's Div/Mult CV jack will modulate the tempo
    • Useful for precisely modulating the speed of one channel with another
• Global LED brightness can be adjusted from the front panel
• Electrical and Mechanical Specifications:
  • Module size:
  • 12 HP Eurorack format module
  • 0.98" (25mm) deep
  • Power consumption:
  • +12V rail: 44mA max
  • +5V rail: not used
  • -12V rail: 30mA max
  Included with the QCD Expander:
  • 10-to-16 pin power cable
  • 16-to-16 pin power cable (to connect to QCD)
  • 4 M3 Knurlie screws