I've got a cool problem I've seen one other person post on (and no, this isn't about sound not working in MDECs).
I ripped an image of my Megaman X4 disc and mounted it on Daemon Tools (latest vesrion) and am using the default CD plugin to play it back from that mounted drive. I have tried running the image without mounting it from every available plugin using numerous plugin settings (but I may have missed one). I have done this in cooperation with cycling through many sound plugins chaning settings here and there and nothing fixes it.
The problem itself: I should first say that MDEC sounds works perfectly, so no problem there. The sound problem occurs when the game loads CDDA sound (title screen for Megaman X4, character select screen, intro dialogue screen between chosen character and base before intro stage, intro stage music itself, and presumably more) and it sounds, to use another poster's words, like rapid "machinegun fire." The sound is probably catching something and looping so it has this repetitive hiccup in the sound. When I use my CD in one of my drives it works perfectly. I have DMA enabled for all of my optical drives and HDDs. I have tried to toggle settings within D-tools but there aren't many settings.
Has anyone else ever heard of this?
I'm using latest version of ePSXe with a P4 2.4 GHz, 512MB DDR PC2700 RAM, Win XP SP2.