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Audio and Video Talk
General Discussion
Stereo VHS as high quality sound source?
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<blockquote data-quote="Steerpike" data-source="post: 68198" data-attributes="member: 807"><p>This doesn't make sense - VHS (as with Beta) has a control track recorded on the tape at 200Hz. The playback machine uses this to vary the capstan speed so it always recovers 200Hz from the control track head, no matter what the exact tape speed is. This timing reference is derived from a quartz crystal. </p><p>I suspect your tapes have physical damage that makes the control track unreadable - letting the capstan free-run, Or the machine has a worn CT head.</p><p></p><p>The FM process makes it completely immune to wow-and-flutter. Any severe speed variation results in total loss of the FM carrier, meaning severe picture noise bars and fall-back to linear audio.</p><p></p><p>I reiterate - my old VHS recording do not have any issues - they are as good as they were in the 80s. </p><p>I also have many, many reels of audio tape going back to the 1950s - apart from some being brittle, the recordings are not deteriorating. No reason VHS tape should be any less robust than that 1/4-inch tape. On the contrary it is more robust, being physically stronger and having higher coecivity.</p></blockquote><p></p>
[QUOTE="Steerpike, post: 68198, member: 807"] This doesn't make sense - VHS (as with Beta) has a control track recorded on the tape at 200Hz. The playback machine uses this to vary the capstan speed so it always recovers 200Hz from the control track head, no matter what the exact tape speed is. This timing reference is derived from a quartz crystal. I suspect your tapes have physical damage that makes the control track unreadable - letting the capstan free-run, Or the machine has a worn CT head. The FM process makes it completely immune to wow-and-flutter. Any severe speed variation results in total loss of the FM carrier, meaning severe picture noise bars and fall-back to linear audio. I reiterate - my old VHS recording do not have any issues - they are as good as they were in the 80s. I also have many, many reels of audio tape going back to the 1950s - apart from some being brittle, the recordings are not deteriorating. No reason VHS tape should be any less robust than that 1/4-inch tape. On the contrary it is more robust, being physically stronger and having higher coecivity. [/QUOTE]
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Audio and Video Talk
General Discussion
Stereo VHS as high quality sound source?
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