From Worms Knowledge Base
Minor sound corruption can occur when playing WormsDC under emulation. This seems to be a timing-related issue, and most commonly occurs when the "Stupid!" sound is played before a Weapon Drop. The second syllable of "Stupid!" will become garbled sound which is quickly interrupted by the air drop sound effect. This may be related to memory issues - the corruption appears to occur after the lower-quality "2M" versions of some sound files are loaded instead of the higher-quality files.
Occasional instrument glitching can occur during the main menu music as well.