[vlc] How to hear all the tracks of a multi-track video

[Alvise Maffei]

I am a big "VLC" fan but I have a problem!
I have many multi-track videos made by joining 3 or 4 videos (they are videos of concerts dowloaded from YouTube) and when I play such videos only the first audio track is enabled (I can see it going to "Audio">"Audio Track") and even if the video is still going on there is no more any audio. Is it possible to enable all the tracks ?
I asked help  and very kindly Rémi Denis-Courmont  replyed me "If you want to play all tracks of a multi-track source, you need to use the command line interface:     # vlc --sout-all --sout '#display'  
I'm not so experienced to understand what I shall do with this string !! Please help me again    Alvise
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