How, when pressing vinyl, does music go onto the actual vinyl? I have seen records pressed but, how do they put non digital files onto a record? Before digital music formats.
In: Technology
There are top and bottom pressing master plates which put indentations or grooves on a polyvinyl chloride ‘biscuit’ which gets flattened out to form a specific size and/or colour of a vinyl record.
Depending on the shape and depth of these groves, a different pitch of sound is created when played back via a turntable’s needle running over the specific part of a groove in a song.
The top plate deals with the side A and the bottom with the B side.
As to how the master plates are created [This should help describe the process](https://youtu.be/5OWEEFg6fTY)
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