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WI. S.. Marlens, "Duration and Frequency Alteration," J. Audio Eng. Soc., vol. 14, no. 2, pp. 132-139, (1966 April.). doi: WI. S.. Marlens, "Duration and Frequency Alteration," J. Audio Eng. Soc., vol. 14 Issue 2 pp. 132-139, (1966 April.). doi:
Abstract: The control of frequency and duration independently of each other is accomplished by means of a rotary tape head. The history and principle of this device are reviewed, as are the various apparatuses employing it. The Audulator, the most recent of such devices, uses a keyboard to alter pitch over 24 chromatic steps without altering duration. The relationship of the musical scale to relative tape speed is discussed.

@article{marlens1966duration,
author={marlens, william s.},
journal={journal of the audio engineering society},
title={duration and frequency alteration},
year={1966},
volume={14},
number={2},
pages={132-139},
doi={},
month={april},} @article{marlens1966duration,
author={marlens, william s.},
journal={journal of the audio engineering society},
title={duration and frequency alteration},
year={1966},
volume={14},
number={2},
pages={132-139},
doi={},
month={april},
abstract={the control of frequency and duration independently of each other is accomplished by means of a rotary tape head. the history and principle of this device are reviewed, as are the various apparatuses employing it. the audulator, the most recent of such devices, uses a keyboard to alter pitch over 24 chromatic steps without altering duration. the relationship of the musical scale to relative tape speed is discussed.},}

TY - paper
TI - Duration and Frequency Alteration
SP - 132 EP - 139
AU - Marlens, William S.
PY - 1966
JO - Journal of the Audio Engineering Society
IS - 2
VO - 14
VL - 14
Y1 - April 1966 TY - paper
TI - Duration and Frequency Alteration
SP - 132 EP - 139
AU - Marlens, William S.
PY - 1966
JO - Journal of the Audio Engineering Society
IS - 2
VO - 14
VL - 14
Y1 - April 1966
AB - The control of frequency and duration independently of each other is accomplished by means of a rotary tape head. The history and principle of this device are reviewed, as are the various apparatuses employing it. The Audulator, the most recent of such devices, uses a keyboard to alter pitch over 24 chromatic steps without altering duration. The relationship of the musical scale to relative tape speed is discussed.