Question: I am currently working on a project which I will need to press a keypad and a music or different tones to come out as

I am currently working on a project which I will need to press a keypad and a music or different tones to come out as a sound from the speaker. I am currently using MPLABX software and PIC18F4520. I have set the keypad as TRISB and speaker as TRISA. A simple source code and header would be useful for my project.

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