Re: [PIC]: Audio Ideas? by James Paul .

Yes, I believe all this could be accomplished. As far as the audio being input directly into the PIC, I would convert it to DC first with a relatively fast filter (short time constant) to smooth the output. This would be better in my opinion than straight audio AC. As fas as filters, there are many many possibilities. But yes, this too should work. Unless you have some very good caps and resistors (or inductors) though, you're not going to be very accurate. Regards, Jim On Fri, 26 May 2000, Josh Koffman wrote: {Quote hidden}> > Greetings, > I had an idea, and I wonder if it would work. Basically, I want to > construct an 8 channel audio VU meter (level meter). This would be used > on a mic/line level source rather than a speaker level source. I think > there are dedicated chips for this, however I wondered if I could do it > with a pic. If I used a 16f877, i'd have 8 analogue inputs, and I could > use an 8 bit port for an 8 segment LED bar graph, and another 8 bit port > to multiplex 8 of those bar graphs. I just am not sure that feeding the > audio signal straight into the ADC would work. I know I would have to > figure out the voltage range. > > Supposing this works, would it the be possible to make a small audio > spectrum analyzer? Perhaps if I put a filter on each analogue input that > only allowed one frequency, or a small frequency range through? > > Anyways, I was just brainstorming. Is any of this even possible? BTW > James did I get the header right? > > Thanks in advance, > Josh Koffman > joshy@spam@mb.sympatico.ca .....jim@spam@spamjpes.com