PSA: going to the seed "05162020" in terraria will unlock an alternate soundtrack. speak to the party girl (who replaces the guide on that seed) and click "music." this will switch to the Terraria: Otherworld soundtrack and it's really good. this unlocks the option to change the soundtrack with any character and world by speaking to the party girl.

also, you get both corruption and crimson and both ores for each tier in the same world if you pick that seed, and i kinda wish you could just pick that as an option in every world without the other generation weirdness it causes