Technology Thread

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Garrett Gilchrist
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Re: Technology Thread

Post: # 10342Post Garrett Gilchrist
Mon Nov 11, 2019 9:39 pm

Python Audio Restoration Suite
A set of tools to restore audio quality from a variety of old analog sources, such as tape, cassettes, acetates and vinyl.

Features
Wow & Flutter Removal
Speed matching to hum frequency
EQ matching with differential EQ
Spectral Temporal Alignment
Automatic Dropout Restoration
Spectral Expander / Decompressor

https://github.com/HENDRIX-ZT2/pyaudiorestoration


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Garrett Gilchrist
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Joined: Tue Feb 12, 2013 1:23 am

Re: Technology Thread

Post: # 10352Post Garrett Gilchrist
Wed Nov 13, 2019 2:22 am






User avatar
Garrett Gilchrist
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Posts: 7262
Joined: Tue Feb 12, 2013 1:23 am

Re: Technology Thread

Post: # 10396Post Garrett Gilchrist
Sat Dec 21, 2019 6:46 am

https://www.domesday86.com/?page_id=2233

What the Domesday project did with software reading of laserdisc data will eventually revolutionize VHS transfers as well. Maybe too late for anyone to still have anything on VHS worth transferring. They output a "raw" RF signal from the laserdisc or VHS tape, which is not so reliant on the player itself, and decode it in software. This was done to get the best possible result from old data laserdiscs.

https://github.com/happycube/ld-decode/issues/16

https://github.com/oyvindln/ld-decode

https://youtu.be/aNAwMmWLFTs

https://www.youtube.com/watch?v=klK4UZ5nlqs

https://twitter.com/textfiles/status/11 ... 6589421573

https://www.youtube.com/user/Zcooger/videos

https://www.youtube.com/channel/UC2w01h ... plnxu3mjOQ

https://twitter.com/MaxKriegerVG/status ... 6757090304

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Garrett Gilchrist
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Re: Technology Thread

Post: # 10407Post Garrett Gilchrist
Tue Dec 24, 2019 12:19 am

https://www.youtube.com/watch?v=xoyNiatRIh4

Interesting; I feel like a similar concept could eventually be applied (with different machine learning) to remove cross dissolves from film clips. Or indeed double exposures (there's some double exposed home movie footage from early Doctor Who).

Other problems that film footage presents would be the rolling flicker seen here:

https://youtu.be/-1A6O2FcIqM?t=28

Or interlacing that's been smeared together, or transferred to film in a way which makes it hard to accurately unpick (as James Insell and company ran into while working on Doctor Who DVDs at one point, and while developing color recovery tech).

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