 The low-fidelity reproduction of these ubiquitous cards was often assumed to somehow be a property of MIDI itself.This created a perception of MIDI as low-quality audio, while in reality MIDI itself contains no sound, and the quality of its playback depends entirely on the quality of the sound-producing device (and of samples in the device).The main advantage of the personal computer in a MIDI system is that it can serve a number of different purposes, depending on the software that is loaded.