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Author Topic: Optical Sound Troubleshooting Help Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 02-14-2013 03:01 PM                        I read that differently, Sam. Voice and piano have a lot of irregular, almost square, waves. Sometimes they will be the first overload you hear. (Piano has an attack that can be very much more than the remainder of the wave.) Louis  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 02-14-2013 11:50 PM                     quote: Louis Bornwasser Hard to say with a Sony in optical. (Their optical is decidedly bad) That's the answer. The Sony DFP-3000 has a HORRIBLE optical A-chain. Just awful.  |  IP: Logged Allan Riddelll Film Handler Posts: 33 From: msida , malta, europe Registered: Jan 2009 posted 02-16-2013 06:12 AM                     Sam Further to my post regarding analog distortion, I replaced the analog board in the Sony processor with no success. You were probably right in your assumption that it is indeed a wow and flutter problem, so therefore mechanical. I have a selection of Dolby test loops which I can use so where do I proceed from here.  |  IP: Logged Sam D. Chavez Film God Posts: 2153 From: Martinez, CA USA Registered: Aug 2003 posted 02-16-2013 10:08 AM                       If it's mechanical, it could be anything from o rings to bearings to downward pressure of the lateral guide roller. The only loop that will measure flutter wow is a flutter bridge and it just gives you a percentage #. Usually high flutter and wow is a symptom not the cause as it were so it will not go away until you find the problem.  |  IP: Logged Rob J. Buskop Expert Film Handler Posts: 111 From: Rotterdam, the Netherlands Registered: Aug 2005 posted 02-24-2013 01:14 PM                     A couple of years ago I had a late nineties reissue copy of Sound of Music here, with Dolby A soundtrack. It looked like new. The film actually could not be shown because off the erratic scratchy and heavily distorted sound...... After much ado, I finally examined the track, that seemed at first to be in pristine condition. Now I scrutinised the track under the microscope. Then and only then the culprit showed it's ugly head: The masking of the dark magenta analog track was riddled with myriads of very small orangy "globules" that were randomly present. Clearly a lab fault, and one that, as it turned out had started much earlier showing itself and which had worsened over time to the point of the film being useless and un-runnable. Another copy that crossed my path with somewhat similar defects was a print of Zefferelli's "Tea with Mussolini". But here the effects were in the image area and larger in size. Anyway, before starting to blame the hardware it's always a good idea to have a really good (and magnified..) look at the film first. Just my cent's worth of some 40 years experience...  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 02-25-2013 11:20 AM                     That orange splatter was caused by the applicator that applied a almost gelatinous redevelopment solution to the sound track area It was either applied by a small spinning wheel or a small nozel that was one of the issues that the caused a lot of rejected prints as processing speeds increased to meet print demands and deadlines  |  IP: Logged

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