I bought this as a workaround because I've read Elsewhere on here that it worked and I still can't seem to get 5.1 to work with my Roku 4K stick and my playbase. I even plugged the Roku directly into one of its HDMI. I can't figure out what I am doing wrong. The HDMI ARC is going into the HDMI output on this and the optical from this is going directly into the soundbar with the Roku 4K stick plugged directly into one of its HDMI spots. Everything else is working great and is plugged directly into the tv itself. Can't get whats up with the Roku 4K stick.
J-Tech Digital HDMI 1.4 Switch Switcher Box Selector 3 in 1 Out Audio Extractor w/Optical SPDIF & RCA L/R Audio Out & IR Control Supports ARC, 4K, Full 3D, 4kx2k, 1080P (Support Apple TV 4Gen) https://www.amazon.com/dp/B00QJGAKCW/ref=cm_sw_r_cp_apa_i_SetPCbKX4MC3Y