Four channels can be transmitted in either direction simultaneously. Below I have added a section (in italic) from Dynacords webpage regarding the USB audio interface: Link: 'DIGITAL USB 2.0 AUDIO INTERFACE The USB 2.0 port serves as a digital audio interface between the PowerMate and a PC or Mac. My interface is a Dynacord PowermWatt amplifier which according to my knowledge should provide 2 stereo tracks or 4 mono tracks though the USB cable. I have had mayor issue about finding out how to record in tracks through Logic Pro as well as Garage Band. To download the proper driver, please find the category of your Dynacord device and click the link. This page contains the list of Dynacord drivers available for download. The USB 2.0-Port Of The CMS Serves As Digital Audio Inter- Face.
Dynacord CMS3 Manual Online: Digital Audio Interface, Installing The Usb Driver, Cubase Le.