


45 RPM
The slower a record spins, the more it's sound quality is affected. In order to deliver the best possible sound, the record must spin faster (45 RPM). However, when a record spins faster, the amount of information it can hold is reduced. The desire to improve sound quality, while ensuring adequate playtime, is a problem that still persists today. Obviously, the "convenience" drawback isn't an issue when you're willing to pay more for two 12-inch records instead of just one.


Direct Metal Mastering
Direct Metal Mastering is an analog record mastering technique jointly developed by two German companies, Telefunken-Decca (Teldec) and Georg Neumann GmbH. Unlike conventional disc mastering, where mechanical audio modulation is cut from a lacquer-coated aluminum disc, DMM cuts directly from metal (copper). This results in more precise high frequency levels and less surface noise.