Quality sound cards and synthesizers support 64 MIDI voices and more. See MIDI patch and MIDI. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction requires permission.

[Emilio] pulled one of these cards with an ADLIB OPL2 chip ... Once [Emilio] had the PIC sending commands to the sound chip, he added MIDI support, allowing him to play this vintage ‘synth ...

Taking considerably less space than digital audio, MIDI files require a wavetable synthesizer on the card, which holds digitized samples of the instruments. See MIDI.