Alesis DM6 via its control module >>> USB Port 1
Audio Interface >>> USB Port 2
- Each device is connected separately to two different USB ports.
- The MIDI DIN on the audio interface is not needed for the USB/MIDI of the drum kit.
- The software in the DAW/VST will manage each device.
- The audio interface can allow you to get the VST drum audio out to monitors or headphones.
- Edit...
"DM6 module contains 108 top-notch drum, cymbal, and percussion sounds" - The module contains its own sounds that could be recorded through the audio interface or played through an amp independently of using a computer.
Overview of the module operation >>>>
http://www.ionaudio.com/downloads/dm6_module_reference_manual_evb.pdf
"The DM6 module has its own internal sounds, but you can also use it as a trigger-to-MIDI interface with drum
module software by connecting its USB port to that of a computer. In this case, triggering the pads and
pedals of the kit will send MIDI messages to your computer, so you can trigger drum sounds from your
software's sound library. You will need to select the proper MIDI output format to use the DM6 module this
way (see below)."
(David, if this is off base please don't hesitate to throw a stone or two at me
)