This might be easier to solve in analog since squelch circuits are easy. = =20 Manu Abraham wrote: >Hi, > >Maybe a filter could help ? > >Regards, >Manu > >On Sun, Jun 24, 2012 at 10:50 PM, wrote: > >> >> >> Hi, >> >> I want to build a FM radio squelch using a microprocessor with an AD= C. >> The ADC will be sampling the FM radio audio output and turn on a >> LED when there is only noise present. The LED will be off when someone >> is using the channel (no noise, just voice). >> >> What is the best way of doing this in software? >> >> Thanks for any idea. >> Mark Jordan >> >> >> >> >> >> -- >> http://www.piclist.com PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> >--=20 >http://www.piclist.com PIC/SX FAQ & list archive >View/change your membership options at >http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .