On 9/8/05, Jinx wrote: > > Two-tone ? > > You won't get two-tone sound from a single piezo that has its own driver. That driver is already (probably) optimised for the resonant frequency of the element. You would have to switch one of the frequency-setting components True, but chopping the buzzer with a (sub) multiple of the resonant frequency will got two tones for the user ears. The lowest will be more than a gruff for lower chopping frequence, but would be two tones. Vasile -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist