Apparently there is a bug in Medievil 2 which makes it often have audio glitches and even crashes in common PS1 emulators.
It does seem like something Sony could have solved internally. (Especially seems fixable with Sony's current PS Classics, as PSP and PS3 had native emulation tools in the system while these current classic releases need to wrap emulator applications into each one of the game packages.) But they never did. Medievil 2 was never released as a PS Classic even in the PS3/PSP heyday of classic game releases. It also was unfortunately not included in the 2019 remaster's bonus content where the PS1 original was an unlockable bonus. (Did they really think that a faithful Medievil remake would sell
so many copies that they just couldn't possibly toss the sequel into the emulator, just in case they did a remaster of Medievil II too?)
Also, neither the PSP or PS4 remakes/remagining of Medievil touched the Medievil 2 content. The PSP game, I get being just the one game's story, and then the PS4 game could have been a bigger production with both games in one but Sony produced it as a "budget" release for $30 at launch. But still, you'd think a developer on either of these projects would want to get through the original content as fast as possible to get to work with the cool Dan Hand.