Hi yes, that is correct.

But perhaps the Roku can support bitstream audio, like DD/DTS which will give you a full 5.1 audio experience for movies.

I would still prefer Multi channel PCM output, since then you can also enjoy lossless DTS-HD MA and Dolby True HD audio..

I would suggest you check our Roku audio settings again perhaps..

#1 568.2mm, HD621, G91DH, 513, 511, DSP3100 , DSP33C , DSP33, 2x MJ Pro 50 MKI, M1500
#2 G68J, HD621, DSP3100, DSP5200HC, DSP33, 3x MJ Pro 50 MKII, MS200, SB Touch, Vertex 2
#3 G61rsl, HD621, 596P, DSP7000, DSP5500HC, DSP33, 2x MJ Pro 50 MKII, M1500

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