I have a guitar pro 6, under Yosemite 10.10.1. Most of the guitar pro files works great, actually all of them, except one.
When I play the song, then I can hear everything, three guitar, bass guitar and drums, but after the intro, the guitars are muted.
Please help me!

 

only the guitars?

 

Maybe you have automation on those tracks?

 

Yes, only the guitar sounds are muted. I speak about this guitar pro file: http://tabs.ultimate-guitar.com/i/in_flames/dead_eternity_ver5_guitar_pro.htm
But it's funny, when I mute the guitars in the beginning of the song, and after the intro part (from this point will gone the guitar sounds) I check out the the mute button, then one guitar sound is working, the other two won't, but if I pause the song, and play again, then this one guitar sound will also gone.
My english is not the best, but I hope you can understand.

 

See also This thread: http://audiosex.pro/index.php?/topic/17932-synthmaster-2-problem/page__view__findpost__p__115299