Its kind of instumental music its not easy to listen It's an open question and let audience use their own imagination and feel in all way that they like to Post rock is... Post is mean later.. after the original rock genre So post rock is to make music by using rock instrument but not intend to be rock music.. But talk about "Rock" music first rock is fundamental of playing music drum, bass, guitar and vocal but post rock change that basic.. into non-rock music Post-rock is happen about 10 years ago long time around 90'.. I dont know who is first person call it "Post-rock" but the first band that I heard they are post rock is "Tortoise" from Chicago and Jim O'Rourke .. he use to be in band "Sonic Youth" as guitarist.. early post-rock is sound much into Jazz music.. got brass instumental.. also "Mogwai" and "Explosions in the sky" 90' is a time of modern rock and alternative the world's mainstream that time.. Post-rock are happen since then. most of the band that time.. already start some music experiment they always got some experimental track, at least one such as 8-10 minutes long track... with no lyrics at 60'-70' there are cross rock or some jazz band that make experimental music in the way that they like for cross rock, they use other sound such as ambient its kind of art music post-rock may got some influence by that also Post-rock sound is not just a basic rock it got more texture and technique and you can't sing along you may think your radio is broken becouse its noisy sometimes Why no vocal ? post rock is unstable and sensitive experimental music not easy to put the right lyrics into it and it can be narrow the meaning of song.. Post-rock may express it's emotion through the music not the lyrics if got lyrics, its may lead audient by words but without lyics audience got space for their own imagination for what they really feel some of post-rock got lyrics and it great also but if it all in singing, this can be narrow the meaning of post-rock music.. Post rock in Thailand, we got many die-hard group such as "Finalkid" group they got band like "Forgot your case" and "Inspirative" SO::ON dry flower group Koichi was in this group.. in my label there was a band like"Goose" Goose is kind of famous but not many track that can play on radio In Thailand.. post-rock is very inch.. not many audience i guess only serious music listener will discover them compare with neighbor .. Post-rock audience in Thailand is very little because its not play much on radio and its very independent real indepentdent.. salf made, share to friends and listen in their group its hard to get promotion by mass media such as radio or magazine, no one talk about them but when they got hook up, it can be chance for all its not easy listening music high degree of experimental stuff but if put it and listen.. we may learn somethings new post-rock have no standard but now people have image in their mind about how post-rock could be actually.. it's not Post-rock is freedom