tar with pipe

[centos.newsgroup at sandsengen.com (Kai)]

CentOS 4.1 X86_64

I am trying to collect all my music files and extract them into a new 
directory flat, (without the hierarchy)

The command works find without the pipe, but do not work with.

1.Why don't the command work after the pipe?
2.How do I remove the hierarchy before extracting?

$ tar -cvf music.tar `find ../ -name '*.mp3' -o -name '*.ogg'` | tar 
-xvf music.tar