Editing High Definition Compatible Digital

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[T]he PM Model One and Model Two professional units, which were combination A/D and D/A converters) that had two different playback (reconstruction) filters for HDCD. While the PM A/D used two different anti-aliasing filters while performing A/D conversion (depending on the level of high-frequency content), they were precluded from using two different playback filters as Ed Meitner had already patented that idea for Museatex (now out of business).
 
[T]he PM Model One and Model Two professional units, which were combination A/D and D/A converters) that had two different playback (reconstruction) filters for HDCD. While the PM A/D used two different anti-aliasing filters while performing A/D conversion (depending on the level of high-frequency content), they were precluded from using two different playback filters as Ed Meitner had already patented that idea for Museatex (now out of business).
 
:— CHansen [http://www.head-fi.org/t/65414/hdcd-list/570#post_12725140]
 
:— CHansen [http://www.head-fi.org/t/65414/hdcd-list/570#post_12725140]
:— US Patent Number 5,388,221: [https://patents.google.com/patent/US5388221A]
 
  
 
===HA Forum posts of interest===
 
===HA Forum posts of interest===

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