I have an old amplifier Onkyo HT-S590 5.1.
I used 5.1 with DVDs, but these are mostly unavailable nowadays.
How can I get 5.1 sound, from Netflix, HBO, Spotify, etc.?
The rest of the equipment I have is a non-smart TV LG 32LH30FR, with a Chromecast (probably 1st gen).
I could purchase a...