Inside Linn's (Classic) Klimax System Hub - Post 2018 Boards - For Surround Module Install in Network Music Players & Music Streamers Posted August 8, 2021 4 hours ago, scallon said: Just what I was advised. I currently have AEDSM with HDMI 2.0 and an OPPO which can decode to 7.1 channel PCM, so no urgent need for the surround sound module. I told my dealer I would only purchase surround sound upgrade for AEDSM if I could transfer it to my next DSM. At the time that was expected to be KSH but will now probably be NGKSH ( further in the future now of course due to extra money involved). I guess most people don't bother asking when they order? I use an NVidia Shield box for streaming and this will generally give Stereo PCM output and sometimes 5.1 PCM Surround so the DSM module upgrade would only give me an improvement to 7.1 surround bitstream on a few services. I've never considered it really worth the cost in my system. I had a similar thought but now some of the TV apps perform better than my AppleTV so decoding would be more useful as they don’t do it for themselves. That’s especially true for Now with Boost which always wins the “app designed by fuvkwits award”. On a separate point I find it bizarre that the new DSM family include models described as AV but with no surround board unless you pay extra - bloody bonkers.