A New Magnetic Tape Recorder with Automatic Adjusting Functions for Bias and Recording Conditions

Sakamoto N, Kogure T, Ogino M, Kitagawa H. A New Magnetic Tape Recorder with Automatic Adjusting Functions for Bias and Recording Conditions. J Audio Eng Soc. 1982;30(9):596-606. Available from: https://aes.org/publications/elibrary-page/?id=3823

@article{Sakamoto1982_3823,
  author = {Sakamoto, Naraji and Kogure, Takuyo and Ogino, Masaru and Kitagawa, Hidemasa},
  title = {{A New Magnetic Tape Recorder with Automatic Adjusting Functions for Bias and Recording Conditions}},
  journal = {Journal of the Audio Engineering Society},
  volume = {30},
  number = {9},
  pages = {596--606},
  year = {1982},
  month = sep,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=3823}
}

TY  - JOUR
TI  - A New Magnetic Tape Recorder with Automatic Adjusting Functions for Bias and Recording Conditions
AU  - Sakamoto, Naraji
AU  - Kogure, Takuyo
AU  - Ogino, Masaru
AU  - Kitagawa, Hidemasa
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 30
IS  - 9
SP  - 596
EP  - 606
PY  - 1982
DA  - 1982/09/06
UR  - https://aes.org/publications/elibrary-page/?id=3823
PB  - Audio Engineering Society
LA  - en
AB  - For that frequency response in record and playback, audio magnetic tape recorders are provided with high-frequency bias-current and frequency-characteristic adjustments. These adjustments are necessary because of the variety of magnetic-tape characteristics from different tape manufacturers. Domestic tape recorders are equipped with a preset tape selector to set optimum bias current and recording-current equalization. It is desirable to adjust bias and recording equalization for each individual tape, but the procedure is hard for consumers, as it requires an audio-frequency oscillator, voltmeter, and other instruments. Proper setting of optimum bias is a serious problem for high-fidelity recording. To solve these problems, an automatic bias-current adjusting circuit and an automatic recording-equalization adjusting circuit have been developed. Time required to complete the adjustments is about 20 seconds. Optimum values of bias current and recording equalization are memorized by the 'analog memory,' a newly developed device. Examples of applications to professional-quality tape recorders are also given.
ER  -