Yes, it is, but the url tags around it added an http:// in front of the URL. You have to remoce that, then the download starts.

I can't modify the post, since I have registered with another name (didn't remmber that, when posting and didn't want to trouble with it now).
The way you formatted it, you won't find the additional source, because I don't have a stable IPÜ, nor a dns entry for my computer running acq.

The proper URI looks like this:

magnet:?xt=urn:sha1:IJUP7VDGLRBMVPV555J2I44JSPNZDA HD&dn=Die%20Nymphe%20und%20der%20Wanderer%2emp3&xs =http://dlaikar.de/arnebab/musik/nymphe.mp3