→Test Files: "please notify" for broken links
It is a barrier to the widespread introduction of any metadata format that the [http://www.xiph.org/vorbis/doc/Vorbis_I_spec.html Vorbis I spec] only requires players to support an unaccompanied [[Vorbis]] stream; many [[Ogg]] [[Vorbis]] players will refuse to play augmented streams, especially if the content is not recognised (although many recent players do succeed). As a prelude to development of an [[Ogg]] metadata format it will be necessary to encourage developers to introduce more flexible [[Ogg]] filters.
To help with testing the following files are available, based on a speculative (and very basic) metadata format. In each case the derivative files are under the same license as the original. Two sets are provided to allow chained stream testing. On some players the seek tests produce an annoying clicking—if you like the music get the originals.
Original (Vorbis I): [http://music.ibiblio.org/pub/multimedia/pandora/vorbis/contrib/Debbie_Hu/Bach-Busoni_Nun_freut_euch_3.ogg Bach - Nun freut euch lieben Christen] performed by Debbie Hu, from [http://music.ibiblio.org/pub/multimedia/pandora/mp3/Read.html Pandora Records] and available under the [http://www.eff.org/IP/Open_licenses/eff_oal.php EFF OAL].