memory my dude

we have memories

music especially is one of the simplest forms of memory, it can be compressed so thoroughly when you mash all your memories of sounds together

AAC and MP3 compression achieve a simple datarate compression of nearly 1:10 on average and if you were to extract all the instrument generator code and samples and work from that it probably flattens down to like 1:100, so imagine what our brain does with all of its memories of sounds

our brains are literally the ultimate sound synthesis machines, just think about what you experience in dreams as far as the sound parts go, those are fully synthetic, in fact they are an artifact of how we create new memories, and you have one every 45 minutes you are asleep