So I've had this issue for quite a while now. I think I've tried everything. For some reason, my android game runs smoothly when all sounds are disabled. As soon as I have a single sound sample executed during runtime, I get a sudden but brief drop in frames (from 60 to about 30-40). I understand that it isn't a huge drop, but it causes some conflict with some of the game mechanics. Also, it doesn't exactly look nice.
As reference, I'm going to use the Balloon Pop sound effect. The sound effect is a MONO, .OGG, 32HZ, 12KB file. It is run using the +Play Sample balloonPop on Channel #6. It is under an Always condition with an -Only one action when event loops (because it checks when the balloon's Y value is lower than a given value).
"Compress Sounds" Ticked
"Play Sounds Over Frames" Ticked
Everything else related to sounds is left unticked.
That's about it, I guess.
Just wanted to reiterate that the game runs EXTREMELY smoothly without sounds being played. Like butter smooth. 60 fps at all times.