An Extended Multichannel Frequency-Domain FxLMS Algorithm for Real-Time Full-Band Adaptive Transaural Reproduction

Fouchard T, Rigaud A, Lecomte P. An Extended Multichannel Frequency-Domain FxLMS Algorithm for Real-Time Full-Band Adaptive Transaural Reproduction. In: Convention Paper. Audio Engineering Society; 2026. Paper 10288. Available from: https://aes.org/publications/elibrary-page/?id=23225

@inproceedings{Fouchard2026_23225,
  author = {Fouchard, Thomas and Rigaud, Alexis and Lecomte, Pierre},
  title = {{An Extended Multichannel Frequency-Domain FxLMS Algorithm for Real-Time Full-Band Adaptive Transaural Reproduction}},
  note = {Paper 10288},
  year = {2026},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=23225}
}

TY  - CPAPER
TI  - An Extended Multichannel Frequency-Domain FxLMS Algorithm for Real-Time Full-Band Adaptive Transaural Reproduction
AU  - Fouchard, Thomas
AU  - Rigaud, Alexis
AU  - Lecomte, Pierre
M1  - Paper 10288
PY  - 2026
DA  - 2026/05/28
UR  - https://aes.org/publications/elibrary-page/?id=23225
PB  - Audio Engineering Society
LA  - en
AB  - This paper presents a multichannel adaptive filtering algorithm for real-time full-band adaptive transaural reproduction on general-purpose hardware. It is based on a multichannel frequency-domain FxLMS algorithm using an overlap-save framework for both filtering and adaptation, and is extended with (i) online plant identification for fully adaptive operation, (ii) frequency-dependent normalization for faster and more uniform convergence across frequency, and (iii) frequency-dependent regularization to limit the control filter magnitude at frequencies where the plant is ill-conditioned. The proposed algorithm is implemented in C on a standard desktop PC and evaluated on a 42 transaural configuration running in real time at 48 kHz with 2048-tap control filters. Four experiments are conducted. The first two assess crosstalk cancellation performance with uncorrelated white-noise reference signals, and yield an average crosstalk cancellation of 32 dB over 100 Hz20 kHz. The last two consider binaural signal reproduction as a more realistic use case of the algorithm. In both cases, performance is assessed under both a static and a moving listener scenario, demonstrating the algorithms ability to re-adapt.
ER  -