
Why do square waves sound so ethereal?
I don't know if it's just the echo/reverb effect these songs have, but music from older sound chips, in particular, creates this dreamlike feeling I can't explain; I don't know if it's just nostalgia or if it's really the square waves. I like to think about what these songs would sound like in arranged versions, but I can't think of an instrument that could replace these sounds. Can someone explain why this type of wave creates this feeling?
Prologue - The Legend of Zelda: Link's Awakening DX OST
Zelda Link's Awakening Music - House
Bridge Zone - Sonic the Hedgehog (8-bit) [OST]
Land of Illusion (Master System PSG) - BGM 02: Title Jingle
Golvellius: Valley of Doom - Overworld 1
Best Sega Genesis Music - Star Cruiser (Main Theme) (This last one also has FM sound, but the square waves are still there)