Not my bag, but it's still pretty interesting
There are a lot of schlock movies that share titles with Slayer song. Take this, or Angel Of Death, or Silent Scream, or Metalstorm, or Criminally Insane. Discuss.
This movie opens with a title card that remarks on enormous powers hidden in the rhythm of music, and to reveal those powers would overturn the world. Wow. Then, during a solar eclipse, the moon turns into a big skull. People would notice if this was anything other than symbolism, so I'm guessing it's kind of abstract - much like the rest of the movie. This is a weird one, guys. The box boasts of a number of prizes from film festivals - I can imagine that it would attract such notice, but if you're looking for a horror movie, move on.
Peter Firth stars as a flautist (that's "flute-player" to you guys who didn't read that Far Side cartoon with the elephant) who finds himself playing melodies that he can't really control. He's approached by a foxy astronomer (Suzan Crowley) who thinks it's linked to some volcanic activity in Turkey, which in turn is also linked to some unusual surface turbulence on the sun during that eclipse. I guess it was only a partial eclipse, because it'd be hard to see the sun during a total eclipse.
So they go to Turkey, where he finds out how his father died (on the day he was born) - clutching his flute, and burnt to a cinder from the waist down. You can just see that guy soloing, saying "Don't stop me now, I'm hot, baby, I'm on fire!" He also meets his half-brother, who was born with little stick-legs. And he has a big spiritual journey as he seeks out some evil bald guy called the Master Musician.
This isn't really a movie anybody would actually look for - I mean, an abstract look at Islamic theology and musical mythology doesn't much pique my curiosity, and it's presentation as a horror movie is almost guaranteed to lead to disappointment. And I can't say I've ever really cared for the whole "spiritual journey" thing, myself being about a one on a zero-to-ten scale of spirituality. But still, for the open-minded, there's probably quite a bit here if you're in the mood for it.
The big appeal of this movie is the Turkish locations - between the deserts, caves, and a gorgeous glacier loaded with streams, waterfalls and pools, it didn't really matter what was happening; it kept me involved just looking at it. Likewise, I really enjoyed the music - I think it's underemployed in the film ("Master Musician", eh? I don't even remember hearing him play), but when it's there, it's different, and it's interesting. The notion of "the power of music" is perhaps taken a little too literally here, but I do like the notion. It reminds me of Gael Baudino's lesbian-fantasy novel (not what you think) Gossamer Axe, in which spellcasting is achieved through musical passages. (it featured a chick who took her harp, turned it into a guitar, and learned to play both harmonized lines of the melodies of Yngwie Malmsteen's "Black Star" AT THE SAME TIME. That, I'd like to see.)
I can't really see this movie appealing to many people, but the right audience is likely to find it quite rewarding. If I haven't turned you off of it yet, then chances are, you might fall into that audience. I don't.