It's not officially released by the band, but it contains official material from the band. We have only bad/pretty weak quality of the Meteora instrumentalsI (because they do not come from a real promo release), so it's nice to have the one from this release. The wav of those from HT instrumentals too. There are only just few tracks, not full instrumental albums, but we don't know if the band would ever release those in lossless format, so It is worth to have it.