This is the intro to Cannon Fodder in GBC. It's probably the only reason you know about this version of the game if you do.
The audio is stored as 4-bit PCM, and most audio programs only go as low as 8-bit, so people would think it's stored at a framerate as low as 4 Khz, when that's not true, it's just 4-bit, and closer to 8 Khz or something. This intro sounded a bit low, so I pitched it up, though I don't know what sample rate it's at now.
I've never played this game on a real Game Boy Colour, so I don't know if the emulators are accurate, or if the real hardware plays it better.
Thanks to Tepples on NESDev.com for the Python script.
http://forums.nesdev.com/viewtopic.php?t=6557