Conversation

Notices

Embed this notice
Obsolete Sony (obsoletesony@mastodon.world)'s status on Friday, 17-Jan-2025 14:36:55 JST Obsolete Sony

The Sony PS-F9 made its debut 41 years ago, and it’s been a style icon ever since.
In conversation about 4 months ago from mastodon.world permalink
Attachments
1. Untitled attachment
  https://s3.eu-central-2.wasabisys.com/mastodonworld/media_attachments/files/113/841/771/907/112/408/original/b632ac1c64959c29.png
- mangeurdenuage :gnu: :trisquel: :gondola_head: 🌿 :abeshinzo: :ignucius: likes this.
- Embed this notice
  jwz (jwz@mastodon.social)'s status on Friday, 17-Jan-2025 17:02:51 JST jwz
  in reply to
  - slash
  @agreeable_landfall @obsoletesony
  That existsed, there were laser needles -- https://en.wikipedia.org/wiki/Laser_turntable
  recall a project where someone managed to extract audio from a vinyl record by scanning it a (90s) flatbed scanner. It was crappy, especiially on the diagonals but it was an interesting proof of concept.
  In conversation about 4 months ago permalink
  Attachments
  1. Domain not in remote thumbnail source whitelist: upload.wikimedia.org
    
    Laser turntable
    
    A laser turntable (or optical turntable) is a phonograph that plays standard LP records (and other gramophone records) using laser beams as the pickup instead of using a stylus as in conventional turntables. Although these turntables use laser pickups, the same as Compact Disc players, the signal remains in the analog realm and is never digitized. History William K. Heine presented a paper "A Laser Scanning Phonograph Record Player" to the 57th Audio Engineering Society (AES) convention in May 1977. The paper details a method developed by Heine that employs a single 2.2 mW helium–neon laser for both tracking a record groove and reproducing the stereo audio of a phonograph in real time. In development since 1972, the working prototype was named the "LASERPHONE", and the methods it used for playback was awarded U.S. Patent 3,992,593 on 16 November 1976. Heine concluded in his paper that he hoped his work would increase interest in using lasers for phonographic playback. Finial Four years later in 1981 Robert S. Reis, a graduate student in engineering at...
- Embed this notice
  slash (agreeable_landfall@mastodon.social)'s status on Friday, 17-Jan-2025 17:02:52 JST slash
  in reply to
  - jwz
  @obsoletesony @jwz What I'd really like is something similar, but which uses an optical scanner. It rotates the record, images the physical groove, and extracts the waveforms for both stereo channels. Then converts those, with corrections for warping and damage, to a full-fidelity audio file.
  If it could do that in real time, it would be awesome. And modern computers are so fast, especially with some DSP magic, that it should be possible.
  As a bonus, save the optical scan for archival use.
  In conversation about 4 months ago permalink
  Attachments
  1. Untitled attachment
- Embed this notice
  jwz (jwz@mastodon.social)'s status on Saturday, 18-Jan-2025 06:49:22 JST jwz
  in reply to
  - Andreas H.
  - slash
  @kosi2801 @agreeable_landfall @obsoletesony Yeah, that might be the one I was thinking of...
  
  In conversation about 4 months ago permalink
- Embed this notice
  Andreas H. (kosi2801@graz.social)'s status on Saturday, 18-Jan-2025 06:49:23 JST Andreas H.
  in reply to
  - jwz
  - slash
  @jwz @agreeable_landfall @obsoletesony Do you mean this?
  https://www.windytan.com/2017/07/gramophone-audio-from-photograph.html
  In conversation about 4 months ago permalink
  Attachments
  1. Domain not in remote thumbnail source whitelist: blogger.googleusercontent.com
    
    Gramophone audio from photograph, revisited
    
    from @windyoona
    
    Extracting audio from a photograph of a toy gramophone record.

Public

Conversation

Notices

Feeds