PWM and audio noise

[Charlie]

This is always caused by either the design or layout. Post the schematic and layout if you really want an answer.

[Art]

You haven’t described what you’re doing, or how the RF relates to the PWM.
For all we know you’re clocking a pic at 10MHz and sending the audio out of a 10MHz WWV receiver through audio on the board.

[Normnet]

A simple software change to try is to rearrange the order of the variables as they are declared. This worked for me although on a different compiler the app did utilize PWM as an audio output. Hope this helps.

Norm