Chiptune, Fugue, Pure Music
chiptune (aka 8-bit music) is a sound style of music from arcade video games of the 1980s. The characteristics is simple synthesized sound, back then due to technological limitations.
However, somehow i love chiptune, because they capture the music itself, without the complex sound from musical instrument. In a sense, it's pure music. (“pure music” in music theory is composition that focuses on the notes combination itself, not sound. (though, few seconds of web search i didn't find the term, for some reason. Maybe i got the term wrong.))
In fact, i always wanted to have a piano such that each key produces a simple beep sound of the right frequency, or a slightly modified pure tone with the right [ ADSR envelope ] [ https://en.wikipedia.org/wiki/Synthesizer#ADSR_envelope ] (so the sound isn't jarring to the ear as [ pure tones ] [ https://en.wikipedia.org/wiki/Pure_tone ] tend to be). This would be great when playing Bach's music, in particular, his fugues, e.g. Well-tempered clavier. See:
8-Bit Liszt, Transcendental Etude #1
8-bit Liszt, Hungarian Rhapsody #2
Here's a fantastic 8-bit version of Liszt's famous song.