Board:   [DoveNet] Pro-Audio Discussion
Subject: Re: Tape deck
From:    Nightfox
Date:    Wed Apr 22, 2020 20:51

@VIA: DIGDIST
  Re: Re: Tape deck
  By: Vk3jed to Nightfox on Thu Apr 23 2020 11:53 am

 Ni>> ago I learned something I never really thought about, that because
 Ni>> vinyl records spin at a constant speed, the grooves toward the
 Ni>> center of the record don't capture high frequencies as well as the
 Ni>> outer grooves because the inner grooves are shorter.

 Vk> Yep, that's related to why CDs use constant linear velocity (i.e. varying
 Vk> the RPM depending on where the laser pickup is reading) - to maximise the
 Vk> storage capability of the medium for a constant data rate. In the analog
 Vk> world, that shows as changes in thefrequency response of the medium as
 Vk> linear velocity changes.

As far as sound quality, I thought the groove length wouldn't really matter with CDs, because it's a series of digital bits rather than analog data.  But it's good that they thought of maximizing storage capacity.

Nightfox

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