You paid for Yamaha's styles when you paid for your Yamaha arranger. Buying the arranger gave you (and only you) the right to use their styles in any way you choose to (in other words, you can't sell them to others, give them away to others, etc.). You can use them for your own original works, you can use them to perform copyrighted tunes at home for your own personal enjoyment, and if a paid venue has its' license in order, you can perform copyrighted material from other artists live, on a gig.

Although you have the right to copy CD's and DVD's for your own personal use, you have no right to distribute, sell or make other works from the contents of those media. Pretty standard stuff, and all fairly well known to all but those who deliberately choose to NOT find out about it.

I am glad someone has a handle on the issue, here...