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<div>The focus on sampling rate is somewhat backwards. The question is what is the needed bandwidth. In theory, and not too far from practice, all one needs is to sample at twice the bandwidth. </div><div>And the real question is the pluses and minuses of including high frequency energy that is above audibility.</div><div>There are no positives, at best you will continue not to hear it. Do you want your email to be packed with stuff you will never see?</div><div>However, such high frequency energy can contaminate what you hear. Probably not much will be noticed in a quality studio, where good gear is to be found. But the end user with lesser quality and much more linearity will have a bigger issue.</div><div>It is more difficult to achieve linearity at higher frequencies. Such high energy with non linearity can cause a problem. It is easy to solve. Make sure that you include what you hear, and don't include anything at higher frequencies. Clearly one may wish for some margins but it should be within reason.</div><div><br></div><div>Regards</div><div>Dan Lary</div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div id="composer_signature"><div style="font-size:88%;color:#364f67" dir="auto">Sent from my Verizon, Samsung Galaxy smartphone</div></div><br><br>-------- Original message --------<br>From: Jim Brown via ProAudio <proaudio@bach.pgm.com> <br>Date: 2/13/20 6:18 PM (GMT-08:00) <br>To: proaudio@bach.pgm.com <br>Subject: Re: [ProAudio] The High-Resolution Challenge <br><br>On 2/13/2020 6:09 PM, Bill Whitlock via ProAudio wrote:<br>> I strongly agree that ultra-sonic spectral artifacts, even if low level, <br>> can have clearly audible effects. The late Deane Jensen wrote a paper <br>> called "Spectral Contamination" that explains the mechanism and <br>> describes a test. As was mentioned earlier in this thread, complex <br>> inter-modulation occurs in virtually every active stage downstream of <br>> the DAC.<br><br>Perhaps 20 years ago, Ray Rayburn told me about hearing a demonstration <br>by Rupert Neve that he said clearly demonstrated the audibility of <br>ultrasonic components.<br><br>Jim Brown<br>_______________________________________________<br>ProAudio mailing list<br>ProAudio@bach.pgm.com<br>http://bach.pgm.com/mailman/listinfo/proaudio<br></body></html>