Thanks, astromo... On some occassions yes I would like to point MC in the direction of my Naim and tell it to play tracks or albums (so to say, push the music toward it) but I haven't yet managed to do it and then there could be a problem that MC would sit on one or more of my computers, the files would be on the NAS and they would both be connected to the Naim. However, by and large this is not the solution that I am looking for, especially that my desktop is quite far from the Naim (and the speakers!). That is why (I think?) the Naim has to look for a UPnP, and I suspect that this implies that the files are where the UPnP software is which in my case has to be the NAS... The QNAP came with twonky but so far its performance been very disappointing and that is why I am looking for an alternative (better, more versatile) UPnP software to put it on the NAS (and then there is a question of how to install it). Linux version of MC seems to be the solution, but would like a few words of reassurance before I embark on such a radical experiment...