A Digital Model of the Echoplex Tape Delay

Arnardottir S, Abel JS, Smith III JO. A Digital Model of the Echoplex Tape Delay. In: AES Convention 125. Audio Engineering Society; 2008. Paper 7649. Available from: https://aes.org/publications/elibrary-page/?id=14800

@inproceedings{Arnardottir2008_14800,
  author = {Arnardottir, Steinunn and Abel, Jonathan S. and Smith III, Julius O.},
  title = {{A Digital Model of the Echoplex Tape Delay}},
  booktitle = {AES Convention 125},
  note = {Paper 7649},
  year = {2008},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=14800}
}

TY  - CPAPER
TI  - A Digital Model of the Echoplex Tape Delay
AU  - Arnardottir, Steinunn
AU  - Abel, Jonathan S.
AU  - Smith III, Julius O.
T2  - AES Convention 125
M1  - Paper 7649
PY  - 2008
DA  - 2008/10/06
UR  - https://aes.org/publications/elibrary-page/?id=14800
PB  - Audio Engineering Society
LA  - en
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.
ER  -