Department of Signal Processing and Acoustics

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.
Band filters of an accurate third-octave cascade graphic EQ

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 collaborate 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 Acoustics and 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 Applied Digital Signal Processing course 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

Juho Liski

Juho Liski

Postdoctoral researcher
Dept Signal Process and Acoust
Benoit Alary

Benoit Alary

Doctoral candidate
Dept Signal Process and Acoust
Karolina Prawda

Karolina Prawda

Doctoral candidate
Dept Signal Process and Acoust
Alec Wright

Alec Wright

Doctoral candidate
Dept Signal Process and Acoust
Leonardo Fierro

Leonardo Fierro

Doctoral candidate
Dept Signal Process and Acoust

Latest publications

Frequency-Dependent Directional Feedback Delay Network

Benoit Alary, Archontis Politis 2020 2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

Velvet-Noise Feedback Delay Network

Jon Fagerström, Benoit Alary, Sebastian Schlecht, Vesa Välimäki 2020 Proceedings of the International Conference on Digital Audio Effects

Towards Objective Evaluation of Audio Time-Scale Modification Methods

Leonardo Fierro, Vesa Välimäki 2020 Proceedings of the 17th Sound and Music Computing Conference

Insights into the String-Barrier Interaction Dynamics Based on High-Speed Camera Measurements

Dmitri Kartofelev, Joan Gustav Arro, Vesa Välimäki 2020 Proceedings of the 17th Sound and Music Computing Conference

Virtual bass system with fuzzy separation of tones and transients

Eloi Moliner, Jussi Rämö, Vesa Välimäki 2020 Proceedings of the International Conference on Digital Audio Effects

Evaluation of Accurate Artificial Reverberation Algorithm

Karolina Prawda, Vesa Välimäki, Stefania Serafin 2020 Proceedings of the 17th Sound and Music Computing Conference

Evaluation of Reverberation Time Models with Variable Acoustics

Karolina Prawda, Sebastian Schlecht, Vesa Välimäki 2020 Proceedings of the 17th Sound and Music Computing Conference

Flexible Real-Time Reverberation Synthesis with Accurate Parameter Control

Karolina Prawda, Silvin Willemsen, Stefania Serafin, Vesa Välimäki 2020 Proceedings of the 23rd International Conference on Digital Audio Effects (DAFx-20)

Third-octave and Bark graphic-equalizer design with symmetric band filters

Jussi Rämö, Juho Liski, Vesa Välimäki 2020 Applied Sciences (Switzerland)
More information on our research in the Research database.
Research database
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