Have you tried your game on another Android device? I have a similar problem that SimpleAudioEngine performs differently on different Android devices. On Samsung Galaxy SII it runs OK, on the other device, the FPS drops while playing effects.
Hi there,
I still had the same issue, but found a solution to go around it. So I thought I might share it.
On android, effects are played for 10s only. You might play your sound using
playBackgroundMusic() instead. Then it works !
Hope it helps someone