Haha, the first time I fired up a working 1942 PCB I actually thought, that the sound was defective. I had never tried the actual arcade game, only the C64-port, which btw has fantastic music. It was only when I found a YouTube-video of the gameplay, that I realized that the 'music' was suppose to sound that awful:
Kind'o'like a soccer referee with hiccups having swallowed his flute, and a sack of potatoes being dragged across a piece of sand paper...
...very disappointening experience };-S