In Administer=>Content management=>Content types=>Audio, in Audio path settings I have the following pattern: audio/[audio-tag-artist-raw]/[audio-tag-album-raw].
When I bulk import audio files, they all go to the base /files directory.
However, when I create audio node manually, it correctly creates the directories according to the file path settings and put files in there.
Why is that, did I miss some settings for Audio_import?
Basically you can override this and use the "Retroactive update" or "Active updating" functionality in Audio file path settings; it works fine and puts all the files from root directory into correct directory specified by pattern.

thanks...