When playing MIDI, the computer sends an instruction to the sound card, and the sound card recombines the MIDI information according to the instructions. Therefore, the playback effect of MIDI depends on the quality and tone of the user's MIDI device. In the case of computer sound cards, the most common means is FM synthesis and wavetable synthesis. The former is mostly used in previous ISA sound cards. It synthesizes MIDI using the principle of sound oscillation. However, due to the limitations of the technology itself, most of the sound cards used in this type of sound card are cheap chips, and the effect is naturally poor. The effect of wave table synthesis is far more than that of FM, and it has been widely used on computers.
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