8mm Forum: Dolby Noise production Super 8mm

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Topic: Dolby Noise production Super 8mm

Osi Osgood
Film God

Posts: 10204
From: Mountian Home, ID.
Registered: Jul 2005

posted November 15, 2007 06:56 PM

Was there ever a Super 8mm projector manufactured with Dolby noise reduction within the projector make-up?

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"All these moments will be lost in time, just like ... tears, in the rain. "

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Claus Harding
Phenomenal Film Handler

Posts: 1149
From: Washington DC
Registered: Oct 2006

posted November 15, 2007 07:56 PM

Osi,

I can't say I have ever heard of one.

I have had thoughts about what a self-standing Dolby II or DBX II processor could do if hooked into/out of the recording loop with a projector.

It might create its own set of problems with regard to accurate playback 'tracking' of the processed sound track because of less-than-ideal frequency linearity of the projector, but since the units worked with cassette tape, it might be fine.

It is curious that no form of 'companding'(compressing/expanding) noise reduction made its way into a format that could really use the help, sound-wise. But there may have been reasons I don't know.

Claus.

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Brad Miller
Administrator

Posts: 525
From: Dallas, TX, USA
Registered: Jun 2003

posted November 16, 2007 02:19 AM

Been there, done that. DBX II works quite amazingly well. The trick is that you need a 1/3 octave equalizer, some reference pink noise on CD and a real time analyzer to "calibrate" your recording gear to that specific stripe. Once you set that up, you are on your way to recording near-CD quality tracks.

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Ugo Grassi
Jedi Master Film Handler

Posts: 506
From: Avellino (Italy)
Registered: Dec 2003

posted November 16, 2007 02:30 AM

The Elmo P COM has a noise reduction system that works like a dolby B. Of course it's not a dolby B, but it seems to be that.

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Ugo

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Kevin Faulkner
Film God

Posts: 4071
From: Essex UK
Registered: Jun 2003

posted November 16, 2007 05:51 AM

Do recordings made on the PCOM with this noise reduction sound ok when played back on machines without?

Kev.

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GS1200 Xenon with Elmo 1.0...great combo along with a 16-CL Xenon for that super bright white light.

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Joerg Niggemann
Expert Film Handler

Posts: 127
From: Germany
Registered: May 2006

posted November 16, 2007 11:38 AM

The "Dynamic Noise Limiter" System (Philips) could do a good job with all Super 8 prints and projectors because signal processing is only active in playback mode. I can imagine that Elmo used a similar system with the PCom. Of course, it's not as effective as Dolby.

DNL Info

Joerg

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Osi Osgood
Film God

Posts: 10204
From: Mountian Home, ID.
Registered: Jul 2005

posted November 17, 2007 04:00 PM

Brad ...

Exactly which DBX system is it that you sue? I ask as I saw a DBX 200 decoder/encoder ata a store for just a few bucks.

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"All these moments will be lost in time, just like ... tears, in the rain. "

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Brad Miller
Administrator

Posts: 525
From: Dallas, TX, USA
Registered: Jun 2003

posted November 18, 2007 02:22 AM

It's been years. I forget what model it was, but it was a type II dbx encoder/decoder.

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Chip Gelmini
Phenomenal Film Handler

Posts: 1733
From: Brooksville, FL
Registered: Jun 2003

posted November 18, 2007 11:37 AM

Although it would not be the same as true DBXII, couldn't you pass the recorded signal through a cassette deck that has Dolby B option via tape loops? Placing this between the Pedro box and the GS1200?

I don't have any of this equipment at all, and I do not rerecord tracks. So maybe I am hopeless. Please do not confirm the part about hopless. LOL

CG [Big Grin]

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Claus Harding
Phenomenal Film Handler

Posts: 1149
From: Washington DC
Registered: Oct 2006

posted November 18, 2007 12:37 PM

Osi, Brad,

The DBX 224 would do this; that's the one I used with my cassettes. It also allowed playback of the very unusual DBX-encoded LPs.

Claus.

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"Why are there shots of deserts in a scene that's supposed to take place in Belgium during the winter?" (Review of 'Battle of the Bulge'.)

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Brad Miller
Administrator

Posts: 525
From: Dallas, TX, USA
Registered: Jun 2003

posted November 18, 2007 05:12 PM

I checked, the NX-40 is the box I used.

Ebay listings from $1 to $23

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