Gap-Length Response in Magnetic Reproducers: Calculation, Measurement, and Compensations

McKnight JG. Gap-Length Response in Magnetic Reproducers: Calculation, Measurement, and Compensations. In: AES Convention 58. Audio Engineering Society; 1977. Paper 1297. Available from: https://aes.org/publications/elibrary-page/?id=3057

@inproceedings{McKnight1977_3057,
  author = {McKnight, John G.},
  title = {{Gap-Length Response in Magnetic Reproducers: Calculation, Measurement, and Compensations}},
  booktitle = {AES Convention 58},
  note = {Paper 1297},
  year = {1977},
  month = nov,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=3057}
}

TY  - CPAPER
TI  - Gap-Length Response in Magnetic Reproducers: Calculation, Measurement, and Compensations
AU  - McKnight, John G.
T2  - AES Convention 58
M1  - Paper 1297
PY  - 1977
DA  - 1977/11/06
UR  - https://aes.org/publications/elibrary-page/?id=3057
PB  - Audio Engineering Society
LA  - en
AB  - Gap-length response S(x) is approximated within 1% by S(x) = sin pi x/pi x, where x = 1.1 lg/lambda, lg = mechanical (optical) gap length, lambda = wavelength, and x < 0.5. Alternately, the gap length is calculated from the measured null frequency fn at the speed v; then lg = 0.8795 v/f. Gap-length response compensation is required by standards, but often neglected in practical professional reproducers. Compensation is easily achieved with an RLC -peaking- circuit.
ER  -