...midi files.
It doesn't play midi files
Many MIDI files on the internet are free and legal to download. Theoretically, a MIDI version of a popular song could be called a "derivative work" and be considered a form of copyright infringement, but I doubt that anyone cares that much about MIDI files anymore.
1983
it is a standard song file
Quicktime.
FL Studio can import MIDI files and export WAV, MP3, OGG and MIDI files.
The DGX-220 can play MIDI files, and there is a USB MIDI driver for these models, but there are no applications for XML files for these keyboards.
wedding dress
Taeyang - Wedding Dress
on the computer
If you mean midi player, it is able to play midi files. Mostly such programs are free of charge and support only this specific function.