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S. Arnardottir, JO. S.. Abel, and JU. O.. Smith III, "A Digital Model of the Echoplex Tape Delay," Paper 7649, (2008 October.). doi: S. Arnardottir, JO. S.. Abel, and JU. O.. Smith III, "A Digital Model of the Echoplex Tape Delay," Paper 7649, (2008 October.). doi:
Abstract: The Echoplex is a tape delay unit featuring fixed playback and erase heads, a movable record head, and a tape loop moving at roughly 8 ips. The relatively slow tape speed allows large frequency shifts, including "sonic booms" and shifting of the tape bias signal into the audio band. Here, the Echoplex tape delay is modeled with read, write and erase pointers moving along a circular buffer. The model separately generates the quasiperiodic capstan and pinch wheel components and drift of the observed fluctuating time delay. This delay drives an interpolated write simulating the record head. To prevent aliasing in the presence of a changing record head position, an anti-aliasing filter with a variable cutoff frequency is described.

@article{arnardottir2008a,
author={arnardottir, steinunn and abel, jonathan s. and smith iii, julius o.},
journal={journal of the audio engineering society},
title={a digital model of the echoplex tape delay},
year={2008},
volume={},
number={},
pages={},
doi={},
month={october},} @article{arnardottir2008a,
author={arnardottir, steinunn and abel, jonathan s. and smith iii, julius o.},
journal={journal of the audio engineering society},
title={a digital model of the echoplex tape delay},
year={2008},
volume={},
number={},
pages={},
doi={},
month={october},
abstract={the echoplex is a tape delay unit featuring fixed playback and erase heads, a movable record head, and a tape loop moving at roughly 8 ips. the relatively slow tape speed allows large frequency shifts, including "sonic booms" and shifting of the tape bias signal into the audio band. here, the echoplex tape delay is modeled with read, write and erase pointers moving along a circular buffer. the model separately generates the quasiperiodic capstan and pinch wheel components and drift of the observed fluctuating time delay. this delay drives an interpolated write simulating the record head. to prevent aliasing in the presence of a changing record head position, an anti-aliasing filter with a variable cutoff frequency is described.},}

TY - paper
TI - A Digital Model of the Echoplex Tape Delay
SP - EP -
AU - Arnardottir, Steinunn
AU - Abel, Jonathan S.
AU - Smith III, Julius O.
PY - 2008
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - October 2008 TY - paper
TI - A Digital Model of the Echoplex Tape Delay
SP - EP -
AU - Arnardottir, Steinunn
AU - Abel, Jonathan S.
AU - Smith III, Julius O.
PY - 2008
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - October 2008
AB - The Echoplex is a tape delay unit featuring fixed playback and erase heads, a movable record head, and a tape loop moving at roughly 8 ips. The relatively slow tape speed allows large frequency shifts, including "sonic booms" and shifting of the tape bias signal into the audio band. Here, the Echoplex tape delay is modeled with read, write and erase pointers moving along a circular buffer. The model separately generates the quasiperiodic capstan and pinch wheel components and drift of the observed fluctuating time delay. This delay drives an interpolated write simulating the record head. To prevent aliasing in the presence of a changing record head position, an anti-aliasing filter with a variable cutoff frequency is described.