Re: Getting the labels of a record
Re: Getting the labels of a record
- Subject: Re: Getting the labels of a record
- From: Michelle Steiner <email@hidden>
- Date: Thu, 17 Apr 2003 09:06:28 -0700
On Thursday, April 17, 2003, at 08:09 AM, Emmanuel wrote:
I may have posted more or less that already, pardon me for that.
To get labels from a record, it's probably best to soak it in water
until the glue dissolves; then you can peel them off gently, and dry
them carefully. But why would you want to do that? It would be hard
to know what songs are on the record afterwards.
Note to the youngsters: A record is a flat vinyl (if you're a real
oldster like Bill and me, you might remember when they were made of
shellack, before the days of vinyl), in which there are grooves cut.
To extract the music, the record is spun at a very precise speed (78
RPM, 45 RPM, or 33 RPM) on a device called a "record player" while a
lever device called a "tone arm" is suspended above it with a "needle"
protruding downwards into the grooves in the record. The force exerted
by the needle is carefully controlled to precise number, usually to a
quarter of a gram. As the record spins, the irregularities in the
groove cause the needle to move both vertically and horizontally (older
versions used only horizontal movement, which resulted in a one-track
sound, called "mono"), and these movements of the needle cause a magnet
affixed to the other end to vibrate inside coiled wires, causing a
miniscule electric flow to be generated in the coils; one follows the
horizontal movement of the needle, and the other follows the vertical
movement, thus generating two channels of sound (called "stereo"). The
entire needle, magnet, and coil arrangement is called a cartridge.
(Note: There is another variety of cartridge, where the coils are
connected to the needle and the magnets are stationery; this is called,
not unsurprisingly, a "moving coil cartridge." It is considered to be
a more accurate measure of generating the electricity in the coils, but
produces a much smaller amplitude, thus requiring a pre-pre-amplifier.)
There's more, but we'd be getting into the very esoteric realm, so I'll
stop for now.
--Michelle
--
You can not change the world without perforce changing yourself.
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