Fernando Santos wrote: > > Hello all, > Can anybody explain me how interface audio signal to digitalized > with Pic 16c71 or other 18 pin pic controller. The only thing you have to do is to amplify the signal and add 2.5 Volts to it. In my current thing, I'm sampling audio at 22050Hz without problems (although the interrupt routine code is highly optimized to leave time for the main loop). Frank ------------------------------------------------------------------------ Frank A. Vorstenbosch Mobile: +44-976-430 569 Wimbledon, London SW19 Home: +44-181-544 1865 frank@falstaff.demon.co.uk Office: +44-181-636 3391