Need a use for your old CD's? Why not turn them into vinyl and play them back with a Emile Berliner gramophone. The Japanese translation goes a little something like this: "Setup takes about one hour. No special tools are needed; anyone can construct it with ease. However, even if you construct it in perfect accordance with the instruction book, the sound quality will still vary for some people. This is because if during the course of making a record even a mere 0.5mm of shake occurs, then there will be an effect on the state of the recording. Whether or not the operations of making a hole in the exact center of the cup or setting the angle of the needle are perfectly performed will appear as differences in the sound. Due to the setting of the mount when recording, differences in those setting may make gaps between the grooves will be large and repair will be difficult. It can be said that proceeding carefully with construction from the beginning is the most important point for picking up clear sound.
Smooth surfaced materials such as a CD-ROM pick up better sound. Also, things like Ramen lids or soft files (what is that?) have a different textured material on the back. Compare the recording sound quality of both sides and the fact that smooth surfaces make for better sound will probably be confirmed. Also magazine covers-you might worry about the papers texture, but the hard coating picks up sound clearly. Materials such as thin aluminum foil bags can be used if you insert something like thick paper or a CD-ROM underneath as a mat. The material of the mat will also affect the sound so all sorts of good experiments are possible." Nice: http://kids.gakken.co.jp/kit/otona/vol09.html Via BoingBoing
