2006-03-12 · in Ideas · 76 words

One problem when digitising vinyl records (or phonograph cylinders, film recordings, etc.) is speed variation in the motor. Since it's meant to rotate at a constant rate, it might be possible to lock the sample rate clock to an optical encoder on the motor. This could be useful for digitising records which will track reliably only at low speeds, since then the speed can be continuously varied without requiring awkward corrections to the digitised data later.