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Post by stanleyb on Jan 29, 2015 21:47:42 GMT
I read an article in the Guardian today that I thought was so fascinating, it should be mentioned here. It can be found at: www.theguardian.com/music/2015/jan/29/bone-music-soviet-bootleg-records-pressed-on-xraysTwo quotes that struck me as very true, and worth discussing in their own right, were “We need to get out of that mindset that background noise happens at the expense of clarity. In the course of my research I listened to cylinders of performances that date back over 100 years ago. It’s hard to explain it, but you registered an acute presence in those recordings that was undeniable.” and “Humans like to hear things that sound like recordings, but the imperfections – the hisses and crackles – make us listen a bit harder. Reaching for perfection is more rewarding to the ears, whereas modern digital recordings deliver perfection directly. Somehow, without the effort, some of the satisfaction is taken away.” |
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Post by MikeMusic on Jan 30, 2015 13:10:32 GMT
Good to read the people needed music and they managed to get it.
One more image of stereotypical cold war grey Russians goes out the window.
I went after the music and when I had it worked on eliminating the extra noises and improving the sound.
Would not like to go back to the/any extra noise if I could possibly avoid it
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Post by stanleyb on Jan 31, 2015 20:28:55 GMT
I have a record that was photographically etched on a 10" x 8" camera sheet film as a stunt. It is a track from JMJ as it happens. Plays very well. I had no idea that it was even technically possible to photographically etch and then being able to play back a record made that way that that sort of material. I remember putting it in a box with my Shalamar records about two decades ago. I'll have a look in the loft if I still got it.
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Post by ChrisB on Jan 31, 2015 20:40:34 GMT
Photographic etching? Gosh, how on earth does that work Stan?
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Post by stanleyb on Jan 31, 2015 21:13:18 GMT
I didn't do it myself. I used to work at AGFA for a while, where we had all sorts of photographic equipment to play with. One was the biggest Polaroid camera in the world.
One of the guys I worked with had been experimenting with transferring the image of a vinyl record on to film. For this project, a vinyl record was put in a light box and then a 8x10" camera is used to capture the image of the vinyl record onto film at a very slow speed and focal range. The film is then developed in a special solution. I can't remember the fine detail of the process since I didn't really pay as much attention as I should have. But I was well enough impressed with the results, so I made sure that I took one of the sheets home with me.
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Post by ChrisB on Jan 31, 2015 21:16:02 GMT
Fascinating.
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Post by MikeMusic on Feb 1, 2015 10:13:56 GMT
Amazing.
I'm open minded but would have said that wasn't doable
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Post by ChrisB on Feb 1, 2015 10:44:30 GMT
I found a patent attributed to AGFA in the 1970s relating to photographic etching. Interesting. |
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Post by stanleyb on Feb 1, 2015 13:52:59 GMT
I found a patent attributed to AGFA in the 1970s relating to photographic etching. Interesting. I have a feeling that was the process that was being used to demonstrate its accuracy. Copying a vinyl record this way that can be played back as well is as accurate as you can get. |
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Barry
Rank: Trio
Posts: 195 
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Post by Barry on Feb 1, 2015 17:38:30 GMT
How would one ensure the etched groove had the required "v shaped" profile?
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Post by stanleyb on Feb 2, 2015 9:07:02 GMT
By using a 1 to 1 copy. That's the reason 8x10 film was used so that there would be no magnification or reduction in size between the original and the copy. The process was only suitable for copying 7" singles.
I just remembered the name of the process. It was called photogravure. The etching of the film version was called Polymer Photogravure.
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