Thanks for the info David.
I downloaded the Ezdrummer demo and asio4all drivers & connected the module directly to the laptop. It mapped fine, but the latency was bad (i.e. I could hear the stick strike the pad before the drum sound) irrespective of the buffer settings.
Would using the UC202 help with latency?
How would I connect to the UC202? Headphone out on the DTX module via a 1/4 jack to twin Rca input on the UC202?
Would using a DAW improve latency further?
Really appreciate your input.
Latency comes from your computer's ability to receive a MIDI note, process it, select a sound and play that back through whatever audio hardware you have. This will be affected by a million things. CPU, Audio chipset, RAM, operating system etc etc etc
Using a UCA202 will help a bit as you're moving the audio processing off the PC. It's a soundcard. You don't connect it to the DTX. You connect to PC.
DTX --> MIDI/USB --> VST --> UCA202 --> Speakers/cans/whatever.