Hi,
my softsynth realtime arranger setups up consist of the following

Option A.
Digital Piano as controller & for playing piano melody voices
512mb , 3.06 ghz Dell Laptop
Audigy 2 NX USB Soundcard ( for loading soundfonts)
Various Banks of GM soundfonts plus assortment of synthesizer soundfonts.
OMB Realtime arranger software
Jammer Live software
BIAB software etc

Option B
as above excluding the Audigy NX 2
instead I use the following software option

Brainspawn Forte http://www.brainspawn.com/products/forte/

Maple Virtual Midi Cable http://www.hurchalla.com/Maple_driver.html

Sounfont Player
LiveSynth Pro N/A
options http://www.rgcaudio.com/sfz.htm http://www.rgcaudio.com/sfz.htm

ASio4All asio driver http://www.asio4all.com/

best wishes
Rikki

p.s.
I have a newer dell duo core laptop with Audigy software inbuilt. Haven't totally sorted out all the snags yet, currently I'm using it for BIAB & loading sounfonts directly.
_________________________
best wishes
Rikki 🧸

Korg PA5X 88 note
SX900
Band in a Box 2022