The synth is only as good as the samples you feed it. Search archives for massive, multi-velocity SF2 banks.
If you run into issues, it's usually one of a few common problems. live synth pro dxi by paradox setup freel better
: Insert Live Synth Pro as a multi-channel instrument. Route separate MIDI tracks to individual MIDI channels (1 through 16) within a single instance of the plug-in to save CPU resources. The synth is only as good as the samples you feed it
: Adjust the velocity sensitivity within the plugin. If the sound feels "flat," increasing the Velocity Tracking allows the timbre to change based on how hard you play, making it feel more like a real instrument. live synth pro dxi by paradox setup freel better