How to match volume for ABX 5.1 to stereo 2013-04-02 22:10:07 Hi all,A while ago I bought a cheap 5.1 surround set (Logitech Z906), mostly to check how much added value multichannel audio has. This I wanted to know, because I'm planning to spend a lot of money buying a nice set of speakers, so I wanted to know whether I should buy two or five speakers However, I've ran into problems. I was trying to 'AB' multichannel audio to stereo audio by just looking whether I could correctly guess which was A and which was B, so omitting the X part of the test, because I haven't installed any special ABX tools. For testing this, I took the multichannel and stereo mixes of the audio-DVD of The Lord of the Rings: The Return of the King (Complete Recordings), because it was the only multichannel source I had. I correctly identified 8/8 of some tracks and couldn't on some others, but I wasn't sure whether this has been because of the multichannel vs stereo part or because of level matching.So my questions to you:1) Is there an ABX tool with which I can do this (so it has to be compatible with multichannel audio) and which runs on Linux or Wine2) How should I level match the stereo with the multichannel? I ask this because there are a few buttons on the remote of the surround set to modify the volume of the rear- and center channels, I suspect setting them to the default setting might not be neutral. Any thoughts?3) Are there other tools that enable me to assess the added value without adding expectation bias?