Download the latest revision. And in DSP desable the Audio Throttle.
I recommend play the game with the D3D plugin, and not the openGL, I play with these config, and I get full speed and perfect graphics here. No problems with sound I think.
I recommend play the game with the D3D plugin, and not the openGL, I play with these config, and I get full speed and perfect graphics here. No problems with sound I think.