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This topic comprises 2 pages: 1 2
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Author
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Topic: Slit Los Eq and Distorzion in Analog Sound
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Marin Zorica
Jedi Master Film Handler
Posts: 671
From: Biograd na Moru, Croatia
Registered: May 2003
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posted 06-08-2004 10:50 AM
In my sound setups at local cinemas i don't use a stereo solar cells for reading analog stereo sound, but i use photo diode (small BPW 34 photo diode 2 in pair each for each channel!!!) and i get very low crostalk between channels (when i run Cat.No.97 L-R test film i get oscilogram like in manuals (this i telling because some people keep saying i can't get ok L-R cross talk with this method of reading optical stereo sound!!!)), but i wonder what is a frequencies response for optical readers with exciter lamp (here we use 6V 5A exciter lamps)????, here some projectors don't have good slit lenses but till now i menage that replacing from projector to projector (where i can get this lenses, and what is coast??), and what is proper width and thickness of slit???, and what power of light is needed for sound reproduction without distorzion, does light intensity effect on distorzion because i have distorzion in higher amplitudes, also does sound reproduction with and without Dolby SR, or Dolby A sound same, what is difference, what would be results if i put any cat.no.22 (A type NR) between pre amp and power amp in my audio chain.
Marin
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Marin Zorica
Jedi Master Film Handler
Posts: 671
From: Biograd na Moru, Croatia
Registered: May 2003
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posted 01-30-2005 04:33 PM
quote: Marin Zorica
In my sound setups at local cinemas i don't use a stereo solar cells for reading analog stereo sound, but i use photo diode (small BPW 34 photo diode 2 in pair each for each channel!!!) and i get very low crostalk between channels (when i run Cat.No.97 L-R test film i get oscilogram like in manuals (this i telling because some people keep saying i can't get ok L-R cross talk with this method of reading optical stereo sound!!!)), but i wonder what is a frequencies response for optical readers with exciter lamp (here we use 6V 5A exciter lamps)????, here some projectors don't have good slit lenses but till now i menage that replacing from projector to projector (where i can get this lenses, and what is coast??), and what is proper width and thickness of slit???, and what power of light is needed for sound reproduction without distorzion, does light intensity effect on distorzion because i have distorzion in higher amplitudes, also does sound reproduction with and without Dolby SR, or Dolby A sound same, what is difference, what would be results if i put any cat.no.22 (A type NR) between pre amp and power amp in my audio chain.
And this is mine L-R crostalak:
What do You think, ideas??
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This topic comprises 2 pages: 1 2
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