I've seen tons of adapters that will take an Optical signal, and output it to 3.5mm/RCA... I need to do the reverse - I want to plug my tablet in to a soundbar that has an Optical input. Does this beast exist?
Interesting, some brutal reviews though... But for $12, who cares - chuck it if it doesn't work. Too bad it needs to be powered - I was really trying to get away from that... Maybe I'll play with an A/B switch instead (less convenient, but seemingly more reliable).
there are tons of different brands, that was just the first one that came up. just search for rca to optical adapter. buy a different brand if you think its more reliable.
they will ALL be powered, otherwise i would not buy one as it would not work. to convert from analog to digital requires processing and only an active adapter will do that (which will need to be powered)
if the soundbar has analog input you could always use an A/B switch as you mentioned.