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This topic comprises 4 pages: 1 2 3 4
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Author
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Topic: Perspect-A-Card
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Stephen Furley
Film God
![](http://www.film-tech.com/ubbmembers/1277b.jpg)
Posts: 3059
From: Coulsdon, Croydon, England
Registered: May 2002
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posted 10-29-2008 01:42 PM
Gordon,
I acquired an old SA-4 for that very purpose, though I haven't used it yet. I would guess that just about all processors have something basically the same as the Dolby pre-amp outputs and mag/aux inputs even if they're labeled differently that you could patch the thing between.
quote: Steve Guttag I've only ever used it in a CP200...worked like a charm. The "Surround" feature will work (though the early cards had an incorrect part stuffed)...however, it does not have the necessary delay to avoid a horrible reverberation effect in a large room....and...probably more importantly...Perspecta films didn't have surrounds.
The 200 is a nice processor if you want to start doing strange things.
You are correct about Perspecta films not having a surround channel of course, but it was proposed that they would add one at a later date. It's mentioned in one of the original Perspecta documents in the Widescreen Museum, using a 25Hz tone, if I remember correctly. I've never heard of this anywhere else, and when I asked Bob Eberenz (I hope I've spelled that correctly) he assured me that it was never implemented. I can't remember the exact wording that he used, but it was something to the effect that it was really just a proposal which was put forward, rather than a definite intention which is closer to what the document says.
For anybody who is not familiar with the Cineman cards they have the option, which can be disabled by a jumper, to create a surround channel in a quite different way; they send the mono Perspecta sound to the surround output in addition the the three main channels when all three tones are detected. The fact that the card replaces the Cat. 150 means of course that it cannot use the delay on that card, and to have included a delay on the Perspecta card would have greatly increased the complexity and cost of the card. Plus, as Steve has pointed out, Perspecta didn't have a surround anyway. I would suggest disabling the surround option on these cards, which I did on mine as soon as I received it. It might be interesting one day to try it just to hear what it sounds like.
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