The built-in sound board 3-tones are different frequencies than those produced by the original sound board (the high, 10's sound, is horribly annoying). I read somewhere, with the Pascal board, you can choose the sounds from any game. There is nothing about this in the P-1/X4 manual. What happens if you choose the wrong game during the game start sequence? Has anyone tried this? Are the 3-tones the same frequency for all of the early games, A to I?