Re: syncing sound on super-16mm

From: marco poloni (email suppressed)
Date: Tue Feb 03 2009 - 02:03:51 PST

This is great. I have been discussing with a friend of mine who does interfaces and he was thinking along similar lines, having a tachimeter regulate projector and sound device. But it is the sound that should drive the image, not the contrary, because fluctuations in sound speed are likely to be immedietly heard, whereas a small variation in the projector's speed is likely to pass unnoticed. I'll rush to this website and study the device! Sounds like a Wallace & Gromit gizmo “Film-O-Sync” - maybe it can also sync a toaster and vacuum cleaner :-)

-----Original Message-----
>From: Todd Eacrett <email suppressed>
>Sent: Feb 2, 2009 11:28 PM
>To: email suppressed
>Subject: Re: syncing sound on super-16mm
>Last spring, Zach Poff posted here about a free application he wrote called Film-O-Sync, available at...
>Basically you modify a projector to output a tachometer signal. The Film-O-Sync software (running on a Mac computer) slaves to the tach signal and plays an AIFF or WAV file in sync.
>Haven't tried it yet, but it seems like a simple and elegant solution. Kind of like shooting with pilot sync. Nothing needs to be crystal or mains synced -- the software makes the audio adjust to the speed variations of the projector.
>(Or you could "sync" two projectors by running both from a single motor -- one S16 for picture, the other R16 for optical sound.)
>Good luck,
>Todd Eacrett
>Victoria, BC, Canada
>----- Original Message -----
>From: marco poloni <email suppressed>
>Date: Monday, February 2, 2009 8:25 am
>Subject: syncing sound on super-16mm
>> Dear Frameworkers,
>> I am embarking on a technical endeavour which consists of
>> attempting to sync super-16mm film with sound at the projection
>> stage. As you well know S-16mm is a camera film. It has no space
>> for an optical track between the image frames and the sprocket
>> holes. I contacted Martin Sawyer in London, who did a good amount
>> of research in adding a very fine optical track. He got good
>> results, but said it was very difficult to find labs that would
>> process this footage. If I am not mistaken, he abandoned this.
>> I'd like to attempt exploring another route. The idea is first to
>> modify an existing 16m projector by widening the gate's aperture to
>> the �W�type gate of S-16mm. That's the not-too-difficult part.
>> Second, I would have to find someone to crystal-sync the motor via
>> an external "master" device that will also pilot the sound of a CD,
>> MP3 or solid state player to ensure perfect sync.
>> I have done quite some research and have some very technical
>> questions. I am writing in the hope that someone might provide
>> feedback.
>> 1. It seems that syncing DC motors is fairly easy, whereas syncing
>> AC motors would be difficult and costly. A friend recommends using
>> a Bauer P8 projector which uses a DC motor. I am a big fan of
>> Eiki's and am not ready to swap brands. I was wondering if anyone
>> knows whether their drive motors are AC or DC?
>> 2. More specifically, should this be feasible with an Eiki, does
>> anyone have a scanned service manual for an Eiki EX-300SL (or EX-
>> 2000)with the electric circuitry? (350W xenon lamp)
>> 3. I have been looking for an Eiki EX-300SL through the usual
>> channels (ebay, ...). It is very difficult to find... Much harder
>> than the more common SSL's. Does anyone know of a place that could
>> have a couple for sale?
>> Thanks a lot beforehand for your input!
>> Best,
>> Marco
>> ------------------------------------------------
>> Marco Poloni, Kors�rer Strasse 1, D-10437 Berlin
>> gsm +41.78.6322028, skype marcopoloni
>> __________________________________________________________________
>> For info on FrameWorks, contact Pip Chodorov at <email suppressed>.
>For info on FrameWorks, contact Pip Chodorov at <email suppressed>.

Marco Poloni, Korsörer Strasse 1, D-10437 Berlin
gsm +41.78.6322028, skype marcopoloni

For info on FrameWorks, contact Pip Chodorov at <email suppressed>.