i went thru the regular tactics to kill shegoth; bombs and missiles, and i got the wave beam. i had already finished the game once, and this file was in the third slot. anyway, As soon as i got it i immediately charged it all of the way and shot the reverse wave beam/powerbeem door. Well, i switched back to the power beam, and i could still hear the buzzing effect of the charged wave Beam!!!
it still is happening on every beam/