To send Audio playing the Surge Kit or using the Surge Module as a Sound Generator you connect the outputs to an Audio Interface...The USB is for MIDI only.
If you want much better sounds...
Steven Slate Drums has a
FREE Version..limited to one 6pc Kit..SSD 5.5.
You'll have to create an account.
KRIMH DRUMS has a
FREE Edition...geared more towards Metal.
BFD Player.
It has been specifically design for Alesis Products.
It is both Standalone and Vst....it's
FREE and comes with a 5GB Core Library based on Dark Farm.
There are now expansions available with 4 Toms..
The Majority of software especially FREE or Limited DEMO are 5 pc kits (Kick/Snare/3-Toms) which is also the standard for E-Kits (w/o expansion pack etc)
A lot of the time all the MIDI maps are Not included so you may have to Map them...sometimes the Mapping is fixed and you have to Re-Map the Module
Follow the instructions in this topic for BFD Player..you need to setup an InMusic Profile..and InMusic Software Center.
Make sure you use the same email address for everything as it all gets connected.
BFDDrums BFD PlayerOnce installed/Audio MIDI setup etc..select the attached Surge Mesh Kit Key/MIDI Map...just as you would for any Vst/DAW setup.
I created the Keymap with 4 Toms and removed Aftertouch as it was causing issues.
The Surge uses the GM Standard for MIDI Mapping so a number of other Maps for other Brands like Roland are exactly the same except the Surge sends a 1/2 open Note..which the Majority of Modules do not send.
Unzip and copy/place map to...
WINDOWSC:\ProgramData\BFD Drums\BFDPlayer\System\Maps
BFD Player User Guide v1.20EDIT:Added Links