I assume you mean the emulation speed is dropping below 100% (which will cause the sound to break up)? If so, there's nothing we can do about it, the device you're on just can't handle the shaders.
Thanks RB... I can understand the scenario. I am also trying to enable OpenGLES on the same. Are there any more shaders that I can pick up for trial apart from the ones in the BGFX folder?