The Labyrinth of Time

The Labyrinth of Time is a DOS adventure game from 1993/1994, loosely based on Greek mythology. Although it was the only game published by Terra Nova Development and wasn't especially financially successful, one of the collaborators on the original game rereleased it in 2004 and 2009 for modern OSes, including the iPhone and iPod Touch.

WEIRD1
The sound WEIRD1 plays when using a teleportation device (which appear at four different points in the game) or when transitioning into the end credits. However, the game contains four alternate versions of the sound effect. Two of them - CWEIRD1 and CWEIRD1O - are identical to the original.

The other two - CWEIRD3 and CWERID1 - have a humming sound in the background and are twice as long, albeit with more dead space for the humming.



It's worth noting that in the game, WEIRD1 plays twice during transitions. The longer versions of the sound might've been intended to cover the entire teleportation effect.

Also interesting: do the "C" prefixes indicate that the sounds were "cut"? Or something similar?

BOOM
There are also two older versions of the BOOM sound effect. The BOOM sound has a linear fadeout about halfway through, whereas BOOMOLD stays at a loud volume the entire time. BOOMOLD1 is a shortened version of BOOMOLD, that drops in volume almost immediately.

BOOMOLD BOOMOLD1