I was playing SSHD and I when I was finished with the level I turned down the sound effects and music volume to 0. When the messege came up it had no sound. I then turned back on the sound effects(not the music) and continued playing. When I finished the level I just kept the sound effects on max volume. I was then rewarded with a trophy and a little sound effect. Could this mean that the developer is the one who has to put the sound in? If thats true, then that would mean 2 things.
1. You have to have game volume up to hear the sound of the trophy.
2. The developer can pick the sound they want to use for getting a trophy.
If that is true that is a very very cool thing. Think of getting one in final fantasy and being rewarded with the dadadada daa daa da dada sound. That would be cool.
Could use guys test this out on your PS3s, maybe its just a bug in my console. Please go try getting one with game sound at 0, then one with game sound at max.