The expert sleepers es 6 mk3 is designed to be used with the expert sleepers es 3 module. The es 6 mk3 features 6 channels of cv input with output via an optical lightpipe connection. The es 6 offers 8 channels overall with the other 2 channels being added by the es 7 expansion module. This mk3 version features new jumpers on the pcb allowing for dc coupling to be enabled disabled for each stereo pair of inputs. Mk3 has also optimised the audio performance of the es 6 ensuring maximum audio fidelity. The expert sleepers es 6 converts control voltages into digital optical signals in lightpipe format. The es 6 mk3 integrates well with audio signals with the same conversion quality as a regular audio interface. Please note a connected es 3 or es 8 is necessary for using the es 6. The es 6 gets its clock signals from the es 3 which derives them from its lightpipe input or es 8 which has an internal clock.