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.

Latest publications

Resampling Filter Design for Multirate Neural Audio Effect Processing

Alistair Carson, Vesa Valimaki, Alec Wright, Stefan Bilbao 2025 IEEE Transactions on Audio, Speech and Language Processing

FLAMO: An Open-Source Library for Frequency-Domain Differentiable Audio Processing

Gloria Dal Santo, Gian Marco De Bortoli, Karolina Prawda, Sebastian J. Schlecht, Vesa Välimäki 2025 2025 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2025 - Proceedings

Optimizing tiny colorless feedback delay networks

Gloria Dal Santo, Karolina Prawda, Sebastian J. Schlecht, Vesa Välimäki 2025 Eurasip Journal on Audio, Speech, and Music Processing

Similarity Metrics for Late Reverberation

Gloria Dal Santo, Karolina Prawda, Sebastian J. Schlecht, Vesa Välimäki 2025 Conference Record of the 58th Asilomar Conference on Signals, Systems and Computers, ACSSC 2024

Neural-network based interpolation of late reverberation in coupled spaces using the common slopes model

Orchisama Das, Gloria Dal Santo, Sebastian Schlecht, Zoran Cvetkovic 2025 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA)

Perceptual Decorrelator based on Resonators

Jon Fagerström, Nils Meyer-Kahlen, Sebastian Schlecht, Vesa Välimäki 2025 Proceedings of the 28th International Conference on Digital Audio Effects

Velvet noise in audio processing

Jon Fagerström 2025

Evaluating Reverberation Models for Augmented Reality

Kyung Yun Lee, Nils Meyer-Kahlen, Sebastian J. Schlecht, Vesa Välimäki 2025 AES: Journal of the Audio Engineering Society

Unsupervised Blind Joint Dereverberation and Room Acoustics Estimation With Diffusion Models

Jean-Marie Lemercier, Eloi Moliner Juanpere, Simon Welker, Vesa Välimäki, Timo Gerkmann 2025 IEEE Transactions on Audio, Speech and Language Processing

Latent Diffusion Bridges for Unsupervised Musical Audio Timbre Transfer

Michele Mancusi, Yurii Halychanskyi, Kin Wai Cheuk, Eloi Moliner Juanpere, Chieh-Hsin Lai, Stefan Uhlich, Junghyun Koo, Marco A. Martínez-Ramírez, Wei Hsiang Liao, Giorgio Fabbro, Yuki Mitsufuji 2025 ICASSP 2025 - 2025 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
More information on our research in the Aalto research portal.
Research portal
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