I am trying to connect my samsung smart tv with hdmi arc but the samsung blu ray disc home theatre only has hdmi out not in. Whats the best way to connect these two devices so all sound that comes through tv can be heard through surround sound.
Sounds like your blueray home theater is not ARC compatible, moreover, it sounds like one of those all-in-one system which will impose limitations on you. Discrete components with a stand-alone AV Receiver is the more standard and versatile system to get.
But OK, your current BR player should play its audio directly to its built-in speakers. Can't get audio from TV unless you have a toslink (surround) and/or RCA (stereo only) audio hookups.