Check the listing for details. 4ms QCD Expander Expansion Module for Quad Clock Distributor. Condition: New. Listed at 199.00 USD. Maximize Your QCD The 4ms QCD Expander is an expansion module for the company's QCD (Quad Clock Distributor) module. At Sweetwater, the QCD has proven itself to be an essential timing tool for any complex Eurorack system, and the QCD Expander adds a bevy of features you won't want to be without — essentially transforming the QCD into a programmatic nonlinear sequencer. With the Expander, each channel of the QCD gets a CV Trigger Delay (Pulse Width) jack and knob, an additional output jack with three selectable modes, and attenuverters for all the CV input jacks. With the QCD Expander, you have total control over common rhythm patterns and can quickly whip up more complex evolving rhythms and shuffle/swing patterns. Maximize the functionality of your QCD with the 4ms QCD Expander.