An approach for implementing time-stretching as a live realtime audio effect

Malloy C. An approach for implementing time-stretching as a live realtime audio effect. In: AES Convention 149. Audio Engineering Society; 2020. Paper 613. Available from: https://aes.org/publications/elibrary-page/?id=20899

@inproceedings{Malloy2020_20899,
  author = {Malloy, Colin},
  title = {{An approach for implementing time-stretching as a live realtime audio effect}},
  booktitle = {AES Convention 149},
  note = {Paper 613},
  year = {2020},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=20899}
}

TY  - CPAPER
TI  - An approach for implementing time-stretching as a live realtime audio effect
AU  - Malloy, Colin
T2  - AES Convention 149
M1  - Paper 613
SP  - 1
PY  - 2020
DA  - 2020/10/06
UR  - https://aes.org/publications/elibrary-page/?id=20899
PB  - Audio Engineering Society
LA  - en
AB  - This paper presents a novel buffer management technique that allows time-stretching to be implemented as a live realtime audio effect. Previously, implementing time-stretching as an effect in a realtime audio system with live input and output was not practical due to technical and perceptual problems. This system is based on the circular buffer, but with a non-continuous, audio level triggered write methodology. This modification compensates for the fact that the output of a time-stretcher is longer than the input. This allows synchrony between a live input and output to be maintained as well as reducing the processing and memory requirements. The buffer management technique is paired here with the Paulstretch1 time-stretch algorithm, but can be adapted for use with other time-stretch algorithms as well. Also discussed are the implementation design details including live, manipulatable FFT window size and stretch factor parameters.
ER  -