This is an interesting topic. I'd like to add my input on it:
As spiritual satanists, we know how to recognize when music is essentially Satanic and when it's not.
I think nowadays we can't be given one definite source for Satanic music. Many of us enjoy different music genres and unfortunately much of what we consider good music for us is influenced by the enemy. However, we can fine comb music and find a couple of individual Satanic tunes if we're willing to be that selective.
I am into rock/metal and *some* country music. Here's a couple of tunes I consider to be Satanic or to bring a truly spiritual message in terms of lyrics (and sound):
Slipknot - Gently
"Gently, my mind escapes into the relaxing mode of pleasure. A pleasure that will take my mind off the reality of my life. My past life
..life as I know it now. And whatever may come, it slowly disappears to somewhere in the back of my mind. It will remain there till I wish to retrieve it"
Tell me if that doesn't sound like instructions for meditation/emptying the mind for meditation.
System Of A Down - Innervision
"My pupils dance, lost in a trance. Your sacred silence, losing all violence. Stars in their place, slowing your pace. I need your guidance, I need to seek my Innervision"
Aerials, also by System Of A Down, has a penetrating introduction which inspires a meditative state in me. And part of the lyrics say:
"Aerials, so up high. When you lose small mind you free your life. Aerials, in the sky. When you free your eyes, eternal prize"
There is also a band called Ensiferum whose songs are inspired in mediaeval themes. They have songs like In My Sword I Trust ("rise my brothers, we are blessed by steel. In my sword I trust") and Star Queen (this title reminds me of Astaroth)
I play a couple of instruments, sing and have played in bands before. I have a couple ideas for beautiful pure Satanic tunes as well, which I hope see the light of day any time.
Hail Amdusias, our musician God
Hail Satan!!!