2015 fire-stick (Amazon brand new) - 2016 LG 43" TV with Optical out into Yamaha Processor, Quad, Kef. Using SUPRA Tos-Link connection.
It works, but the sound is poor quality, almost compressed with minimal surround. Standard Amazon Prime Music(subject to age of source material) also suffers from the same lacklustre presentation. I have set/re-set the TV "SoundOut" paramaters with limited improvement. Any suggestions please?