It just means a collection of songs by different artists, drawn from different CD collections.
http://popularmusichistory.com/
A Compilation of Warped Music was created in 1998.
A Compilation of Warped Music II was created in 1999.
The music gets louder
slowly!
Slow
pianissimo!
In musical terms, rinforzando means reinforced.
That's not a standard term in music.
"A Very Special Christmas" is the name of music compilation for several different Christmas music. Actually the special thing about this compilation is that it benefits the "Special Olympics".
Play loudly!
It means "smooth and connected".
A style or music is simply a characteristic that sets it apart from other types of music.