Learned about Soundfonts. These files carry the extension sf2 and are a collection of sounds that can be loaded into the memory banks of a compatible soundcard, such as the the Soundblaster Live. Soundfonts can be used to enhance the quality of MIDI playback at the hardware level, while additionally reducing latency and allowing for real-time play. Soundfonts can be uploaded to the card through the use of Vienna SoundFont Studio. You will either need Cubase or the official Creative drivers in order to upload Soundfonts to the sound card.
HammerSound has an extensive library of free and commercial soundfonts, though some of them are now defunct. For piano, I prefer the Steinway Model-C Grand Piano by Warren Trachtman.