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usc-imi / aeo-light

AEO-Light 2 is a new generation of optical sound extraction software developed by the University of South Carolina in close cooperation with Tommy Aschenbach. The project is made possible by the generous support of the National Endowment for the Humanities.
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Neg Density track clipping #16

Closed ziggyphenocious closed 5 years ago

ziggyphenocious commented 5 years ago

We have been scanning a lot of negative variable density and have noticed in the various audio recovery applications that there is often some "squaring" of the tops of the waveform. I have attached images showing the settings and the appearance of the waveform. Is there any different settings we should try to improve this? The sound is much better than with our red led Sondor reader, but there is still some distortion we have not been successful in eliminating.

nr002527-s_aeo_snip1 nr002527-s_aeo_snip2 nr002527-s_aeo_snip3

ziggyphenocious commented 5 years ago

nr002527-s_aeo_settings

sjohnson-imi commented 5 years ago

Just judging by the picture, it seems the squaring is accurately reproducing that part of the scan (the gray stripes in the soundtrack area) -- that the waveform was either clipped in the original recording or perhaps in the scanning process. But if you'd like to make a few raw frames available in dropbox or Google drive for us, we can take a shot at tweaking those settings to draw out additional detail. (You can send a link to me at sjohnson.imi@gmail.com)