11–20 of 107 posts
Stero channels aren't encoded in the depth and radial axes. They're encoded in the same plane, but rotated 45 degrees, so a mono record player (depth only) plays a balanced sum of each channel. Edit: mono is radial only, not depth.
I remember wondering whether a laser "needle" could work. IIRC the format has some funky EQ and other things to make a physical needle work better.
not cheap, but yeah it works great. https://www.elpj.com/ I actually got to hear one once. Extremely neutral and high-res, but the record has to be super clean because with the laser, you will hear every little speck of dust. Also it doesn't work with colored vinyl, iirc. edit: they use 5 different lasers to get the data out of the groove, go read the section on their site, it's actually really intricate and cool > t…
Audiophiles likely know of this, but I'm still surprised.
Clean vinyl records with glue...
https://everyrecordtellsastory.com/2015/05/25/how-to-deep-cl...
Other related projects: http://recherche.ina.fr/eng/Details-projets/saphir https://irene.lbl.gov/
Don't forget https://www.windytan.com/2017/07/gramophone-audio-from-photo...
This is art!
Stero channels aren't encoded in the depth and radial axes. They're encoded in the same plane, but rotated 45 degrees, so a mono record player (depth only) plays a balanced sum of each channel. Edit: mono is radial only, not depth.
Stero channels aren't encoded in the depth and radial axes. They're encoded in the same plane, but rotated 45 degrees, so a mono record player (depth only) plays a balanced sum of each channel. Edit: mono is radial only, not depth.
Thinking about a simpler system... how about getting a camera on a turntable recording a video while the record turns. It would then be possible to track a line with an specified width in the video and turn the changes in a piece of this line it into a waveform.
I remember wondering whether a laser "needle" could work. IIRC the format has some funky EQ and other things to make a physical needle work better.
The funky EQ is the RIAA curve[1] - by essentially rolling off the bass and boosting the treble you can fit more on a disc, it attenuates some of the clicks and pops and is kinder on the vinyl and needle. It's trivial to invert in software, and as another response points out, there is indeed a working laser record player - although the record needs to be extensively cleaned before playback or it doesn't work very wel…