I found out that setting High Compatibility Mode and SPU IRQ Wait to ON in the Alsa 1.1.0 configuration can run MGS in the last SVN pcsxr version. The sound is not good, there are many slow down with the OpenGL plugin but only a few of them with the XVideo driver. When I know how to install the 48419 version of the Alsa plugin, I will try it because I suspect that there is a bad interaction between the video and the audio plugin.
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