Hi guys, just adding this as an issue here as per a previous conversation with @Optiroc.
Easiest way to replicate:
If you load it up and select arcade mode, and then select one of the shootout sections (I think F2 on the selection screen is one). When the game starts, hold down the mouse button to shoot and you'll see how messed up the sound is. It plays a load of random game samples followed by some horrid white noise/glitched sample sounds, which does eventually stop (thankfully). It should just play the sample of Robocop's pistol.
I think this is another one of those 68020 CPU speed / timing things.
It doesn't happen in WinUAE using the preset expanded A1200 configuration, so it isn't a WHDload issue.
If I boot from floppies in A500+/ECS mode, it is fine of course.
I've stumbled across a few games now which have messed up or glitchy sound in 68020 mode on MiSTer - as i've mentioned previously games like Hostages and Shufflepuck Cafe are slightly glitchy, same in WinUAE, but ticking cycle-exact fixes it.
Not sure if you can really do anything about the issue with this game given the fact MegaAGS has to boot in 68020/AGA mode. @Optiroc suggested it could be a regression with MiSTer regarding sound in 68020 mode.
I thought i'd flag it here though in case you wanted to add a note to the DB.
There are no bugs filed on the WHDload Mantis bugtracker for this issue, but as I say I think it may be MiSTer specific, as it doesn't happen when you mount MegaAGS in WinUAE.
I'm not sure if this would still happen when using the WHDload version of the game on a A600HD 68000 type config - I don't have the environment to test this. But as MegaAGS needs 68020/AGA to run, this is a moot point anyway.
Perhaps this issue would be best placed in the Minimig issues for MiSTer - let me know what you think.
Cheers!