I liked Santa to sing more scary, so I did some simple circuit bending to modify the sound. Open the case. First find the clock resistor. If you have the same Santa model refer to the image. There was only one resistor, so it was not too hard to find it. If there are more, and you dont know what to do, refer to the great "Simple ways to circuit bend a toy
"-Instructable of nknouf.
I recognised some unused solder points on the little pcb, so I shortcutted the resistor with those points and got some scary sounds. Here is what I came off:
I soldered a 470 K resistor in row to the clock resistor to make the sound go slower. Then I connected the clock resistor double via tree 1 M resistors in a row with the solder point marked on the image. Follow the instructions on the images!
This is what it sounds like after the mod: