The MIDInight Express is a programmable software wavetable MIDI player and MIDI to WAV renderer. No wavetable card is required. Any entry-level 16 bit sound card, or even the simple sound circuits found in most laptops, will do just fine.
All wavetable synthesis is done in software.
Also, unlike most wavetable cards, the MIDInight Express uses your PC's disk and memory for sample storage, allowing it to use larger, higher quality instrument sounds. This program is freeware and has no trial limitations.