Making piezo buzzer sound melodious and smoother using pwm and timer programming

[Ayush]

 what parameters should be adjusted for making piezo buzzer sound smoother?

[Mttrinh]

Hi,

I'm not sure what you mean by "sound smoother"? 

If you want the piezo buzzer to make different sounds/notes, you will have to change the PWM freq and a PWM output with preferably 50% duty cycle.

Also, since you are driving a piezo from a PWM, even at the desired frequency, you will probably not get the sound that you want because you are driving a square wave. 

[Joseph Ayuk]

I think he is trying to talk about tones and notes on the piezo buzzer. I am also working on it