[ProAudio] The High-Resolution Challenge

[Dan]

Sorry, in the last paragraph I ment to say "But the end user with lesser 
quality and much *less**linearity"*

On 2/13/2020 9:07 PM, Dan Lavry via ProAudio wrote:
> 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.
> And the real question is the pluses and minuses of including high 
> frequency energy that is above audibility.
> 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?
> 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.
> 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.
>
> Regards
> Dan Lary
>
>
>
>
>
> Sent from my Verizon, Samsung Galaxy smartphone
>
>
> -------- Original message --------
> From: Jim Brown via ProAudio <proaudio at bach.pgm.com>
> Date: 2/13/20 6:18 PM (GMT-08:00)
> To: proaudio at bach.pgm.com
> Subject: Re: [ProAudio] The High-Resolution Challenge
>
> On 2/13/2020 6:09 PM, Bill Whitlock via ProAudio wrote:
> > I strongly agree that ultra-sonic spectral artifacts, even if low 
> level,
> > can have clearly audible effects. The late Deane Jensen wrote a paper
> > called "Spectral Contamination" that explains the mechanism and
> > describes a test. As was mentioned earlier in this thread, complex
> > inter-modulation occurs in virtually every active stage downstream of
> > the DAC.
>
> Perhaps 20 years ago, Ray Rayburn told me about hearing a demonstration
> by Rupert Neve that he said clearly demonstrated the audibility of
> ultrasonic components.
>
> Jim Brown
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