Path: utzoo!attcan!uunet!know!zaphod.mps.ohio-state.edu!usc!elroy.jpl.nasa.gov!lll-winken!unixhub!shelby!rosentha@sierra
From: rosentha@sierra.STANFORD.EDU (rosentha)
Newsgroups: sci.electronics
Subject: Re: ..but what about _output_ filtering for D/A's?
Message-ID: <88@sierra.STANFORD.EDU>
Date: 25 Oct 90 18:39:23 GMT
References: <1319@beguine.UUCP> <17660121@hpfcdj.HP.COM> <7486@eos.arc.nasa.gov>
Organization: Stanford University
Lines: 4


  	Can a 20 and 21khz tone combine to give an audible difference
frequency?  Yes they can, if they are loud enough.  The ear has some
nonlinearity and should mix the two signals down to a kiloherz.