Obviously the application of this unit would depend on how you have set up your modular. That said there are many modules that require clock to sync with this module you can play / slow down the clock being sent to units linked to this. With the Expander you change the timing of the clocks even further. It’s a pretty useful module for larger systems but can also work in smaller ones. Pls read the official blurb below. Introducing the 4ms eurorack Quad Clock Distributor / Sequencer with Expander, perfect for any music enthusiast looking for enhanced sequencing capabilities. This powerful device from 4ms boasts an impressive set of features that make it ideal for musicians and sound designers. With its clock distribution capabilities and advanced sequencing functions, users can create complex rhythms and patterns with ease. Four channel voltage controlled Clock Divider/Multiplier with master Tap Tempo. Each channel can be synced to the tap tempo, to the channel above, or to an external clock. Each channel also has a reset jack. With a Tap Tempo button and five sync’ed clock outputs, the QCD is a versatile head-of-the-chain “Master” clock module, and/or a complex rhythmic pattern generator. Four CV-controlled Clock Divider/Multipliers. Tap tempo button and five sync’ed clock outputs make the QCD perfect for head-of-the-chain “Master” clock module. Tap clock output runs at the tapped tempo (even if other channels are being clocked externally). Create complex rhythmic patterns by patching multiple channels into each other’s Div/Mult CV and Reset. Each of the four channels has an independent clock IN, OUT, Reset and Div/Mult CV. Divide or Multiply incoming clock from /32 to x16 on each channel. Detented knob to snap to integer division/multiples. CV jack to modulate Div/Mult amount. Reset jack (per channel) restarts the clock when a trigger is received (alters phase of clock). Clock input jacks are normalized downwards: Tap->Red->Black->Blue->Green. Clock outputs stop automatically when incoming clock stops. LEDs blink to output clocks’ tempos. 5V clock output pulses, fully buffered. Default is square-wave, and PW is controllable with expander. Daisy chain multiple QCDs or other clock modules using Tap Out jack. Header on the PCB to connect to Quad Pingable LFO (QPLFO) to provide four CV Skew-able, CV Div/Mult-able envelopes. Interfaces with QCD Expander for more features (Pulse Width, Inverted Gate, attenuverters for CV inputs). Connects to QCD module with a 16-conductor ribbon cable (included). More features are added to each QCD channel. Global LED brightness can be adjusted from the front panel. 4ms Quad Clock Distributor Expander Module. Expansion module for the Quad Clock Distributor (QCD). The Expander turns the QCD into a programmatic non-linear sequencer, allowing you to easily create everything from self-patched evolving rhythms, to swing / shuffle patterns, to classic dance beats. Each of the four channels has. Multi-mode output jack INV OUT, which 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. The device is designed for use with eurorack systems and fits seamlessly into any setup. It is compatible with various brands, including 4ms, and can be used to control multiple devices at once. Get ready to take your music production to the next level with the 4ms eurorack Quad Clock Distributor / Sequencer with Expander.