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This topic comprises 2 pages: 1 2
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Author
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Topic: FP20 Dolby Digital Analogue Output
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Dave Macaulay
Film God
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Posts: 2321
From: Toronto, Canada
Registered: Apr 2001
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posted 02-13-2016 09:28 AM
Yes, the CP45 has internal bi-amp crossovers. They are activated on the CAT510 board: switches 4, 5, 6 ON for LF/HF crossover, OFF for full range output. (L, C, R respectively) This was Dolby's "budget" processor and cuts a few corners, but it should sound fine. With a CP55 you can use a CAT222SR/A DSP card for Dolby decoding - the same card used in the CP45... and generally considered not too good. You could also find an SRA5 outboard SR adapter, using CAT350T SR cards in it and the original CAT222 Dolby A cards in the CP55. These are very complicated analog cards, and considered the best. The SRA5 and CAT350T cards were $$$$ not long ago... but you should be able to find them pretty cheap now. If you can find a used CP65, it's considered by many to be the best Dolby film processor. You can use the 222SR/A... or install CAT222 and CAT350T cards in the chassis for ideal Dolby A and SR decoding. You need some alignment test films (Dolby level and pink noise definitely, there are others not as vital) to set up the soundhead regardless of what processor you have. These can be hard to find now. Dolby encoded optical tracks (basically every track in the last several decades) will sound "off" with no decoder or incorrect level.
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