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Distored audio coming from projector


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#1 Jim Moore

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Posted 15 August 2015 - 04:40 PM

Today I tried to screen some finished pieces on a B&H 2580 16mm projector. The audio was very distorted, with any luck I could make out half of the dialog. I swapped exciter lamps and refocused the light beam hitting the photo cell but to no avail.

 

Can anybody point me in the right direction on where to look next? It happens on multiple reels.

 

Thanks

Jim


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#2 Tyler Purcell

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Posted 15 August 2015 - 05:00 PM

Can you capture some of what it sounds like and post it here?

Distortion is usually caused by a bad amplifier, rather then the pickup element itself.
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#3 Alessandro Machi

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Posted 15 August 2015 - 05:14 PM

It's always good to have a piece of film with the same type of sound on it as your present film that you KNOW is not distorted, and see how that sounds. If the previously played back piece of sample 16mm sounds ok now, then maybe there is problem with your film. If the sound is distorted on the sample piece of film that you know from prior projection has normal sound, then you probably have a projection issue or downstream audio amplification issue.

If the projector has a headphone jack by all means check that out and also check where the volume dial is set to and slowly move it around and evaluate.


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#4 Jim Moore

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Posted 15 August 2015 - 06:58 PM

Thanks. I'll post an audio sample tomorrow when I get back into town.


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