yes, you're correct: using the linuxsampler-lv2 plugin does copy the sample files into the session archive (.qtz) when this session file format is chosen.
however, note that the .sfz file is just a regular text file which describes and refers to the actual sample files, indirectly; it should be the responsibility of the linuxsampler-lv2 implementation to provide those indirections available to the lv2-files interface and thus known to qtractor to get them onto the archive/zip file .
iow. this is something that should be addressed to the linuxsampler-lv2 developers, specially the sfz engine lv2-files interface (iirc. this was already discussed on the linuxsampler-devel maillist, but i don't really know the outcome or whether it's been already fixed and you're using an outdated linuxsampler build).
of course using the shallow session file format (.qtr or .qts, which are exactly the same) nothing of the above applies, as all sample files stay put on their original places in the file-system. please use the session archive/zip file format for, you know, archival portability purposes only.
yes, you're correct: using the linuxsampler-lv2 plugin does copy the sample files into the session archive (.qtz) when this session file format is chosen.
however, note that the .sfz file is just a regular text file which describes and refers to the actual sample files, indirectly; it should be the responsibility of the linuxsampler-lv2 implementation to provide those indirections available to the lv2-files interface and thus known to qtractor to get them onto the archive/zip file .
iow. this is something that should be addressed to the linuxsampler-lv2 developers, specially the sfz engine lv2-files interface (iirc. this was already discussed on the linuxsampler-devel maillist, but i don't really know the outcome or whether it's been already fixed and you're using an outdated linuxsampler build).
of course using the shallow session file format (.qtr or .qts, which are exactly the same) nothing of the above applies, as all sample files stay put on their original places in the file-system. please use the session archive/zip file format for, you know, archival portability purposes only.
hth.
cheers