Department of Information and Communications Engineering

Audio signal processing

The Audio Signal Processing Research Group is working on wideband sound technology, which is extensively applicable for example in smart phones, music technology, gaming, sound reproduction, and noise control.
Acoustic measurements at the Aalto Acoustics Lab

Our research topics and projects are related to headset signal processing, loudspeakers, sound synthesis, effects processing algorithms, digital filters, musical instruments, acoustic measurements, subjective evaluation, and interactive audio systems. The emphasis of our research is on digital signal processing and machine learning methods which account for the properties of human hearing. We have collaborated with several companies, such as Genelec and Nokia Technologies. Much of our academic research is conducted in collaboration with foreign partners, such as Aalborg University, The University of Edinburgh, and Stanford University.

This research group organizes the Audio Signal Processing course at Aalto University annually in January-April. We also arrange the Audio Technology Seminar every second year (February-May). Both courses are suitable for Master's and doctoral students, who have a solid background in acoustics and digital signal processing. Additionally, we are responsible for the Noise Control course for Master's and doctoral students and for the Sound and Speech Processing course (Äänen- ja puheenkäsittely, in Finnish) for BSc students.

The Audio Signal Processing Research Group belongs to the Aalto Acoustics Lab. The research group is led by Professor Vesa Välimäki, IEEE Fellow, AES Fellow.

Group members

Latest publications

Multi-shelf graphic equalizer

Sebastian J. Schlecht, Tantep Sinjanakhom, Vesa Välimäki 2025 Signal Processing

Efficient Velvet-Noise Convolution in Multicore Processors

Jose A. Belloch, Jose M. Badia, German Leon, Vesa Välimäki 2024 AES: Journal of the Audio Engineering Society

Real-time implementation of a linear-phase octave graphic equalizer

Valeria Bruschi, Stefania Cecchi, Alessandro Nicolini, Vesa Välimäki 2024 Proceedings of the 27th International Conference on Digital Audio Effects (DAFx24)

Sample rate independent recurrent neural networks for audio effects processing

Alistair Carson, Alec Wright, Jatin Chowdhury, Vesa Välimäki, Stefan Bilbao 2024 Proceedings of the 27th International Conference on Digital Audio Effects (DAFx24)

RIR2FDN: An improved room impulse response analysis and synthesis

Gloria Dal Santo, Benoit Alary, Karolina Prawda, Sebastian Schlecht, Vesa Välimäki 2024 Proceedings of the 27th International Conference on Digital Audio Effects (DAFx24)

Active Acoustics With a Phase Cancelling Modal Reverberator

Gian De Bortoli, Karolina Prawda, Sebastian Schlecht 2024 Journal of the Audio Engineering Society

Differentiable Active Acoustics: Optimizing Stability via Gradient Descent

Gian De Bortoli, Gloria Dal Santo, Karolina Prawda, Tapio Lokki, Vesa Välimäki, Sebastian Schlecht 2024 Proceedings of the 27th International Conference on Digital Audio Effects (DAFx24)

Binaural Dark Velvet Noise Reverberator

Jon Fagerström, Nils Meyer-Kahlen, Sebastian Schlecht, Vesa Välimäki 2024 Proceedings of the 27th International Conference on Digital Audio Effects (DAFx24)

Non-Exponential Reverberation Modeling Using Dark Velvet Noise

Jon Fagerström, Sebastian J. Schlecht, Vesa Välimäki 2024 AES: Journal of the Audio Engineering Society

Matching early reflections of simulated and measured RIRs by applying sound-source directivity filters

Anthony Gallien, Karolina Prawda, Sebastian J. Schlecht 2024 4th International Conference on Acoustics and Sound Reinforcement, ASR 2024
More information on our research in the Aalto research portal.
Research portal
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