| Contents | Teachers | Prerequisites | Enrollment | Literature | Requirements | Schedule | Topics | Teams, Participants, and Student Presentation Schedule |

The seminar is devoted to changing current topics in audio signal processing. In fall 2009, the topic of the seminar will be digital filters in audio processing. The seminar will focus on the use of FIR, IIR and allpass filters for example in equalization, sampling rate conversion, and sound synthesis. The language of the seminar is English.

Teachers

• The seminar is organized by Prof. Vesa Välimäki.
• Contact: S-89.3580@acoustics.hut.fi

A tentative list of topics for seminar papers is as follows:

1. Alias-reduced classical waveform synthesis using allpass filters
2. Cross-over networks for digital loudspeakers
3. Efficient FIR filter design using IFIR and frequency-masking methods
4. Decorrelation filters for stereo and multichannel audio
5. Feedback delay networks for artificial reverberation
6. Filter banks and multirate filters
7. Fractional delay FIR filters
8. Fractional delay allpass filters
9. Fractional delay inverse comb filters for harmonic analysis
10. Graphic and parametric equalizers
11. Head-related transfer function (HRTF) filters
12. Inharmonizing allpass filters for vibrating string simulation
13. Kautz filters
14. Lagrange interpolation filters
15. Loop filter design in waveguide string models
16. Loudspeaker equalization
17. Modeling of acoustic responses (Prony’s method, Steiglitz-McBride algorithm, FZ-ARMA)
18. Resonant filters in sound synthesis (linear & non-linear)
19. Transients in time-varying IIR filters
20. Sampling rate conversion
21. Warped filters
22. Wave digital filters
23. Waveguide modeling of acoustic tubes

The basics of acoustics and digital signal processing, such as the courses S-89.2300 Sound and Voice Technology and T-61.3010 Digital Signal Processing and Filtering, or their equivalents.

Please register to this course using WebOodi.

Book chapters, papers from journals and conferences. Examples on online material:

• DAFx Web Page (first select the year of the conference; papers accessible through the proceedings link)
• AES On-line Electronic Library (direct link that works from the campus). Papers can also be obtained from the Acoustics Lab Library.
• Engineering Village 2: campus access only, search for "sound analysis" and refine.
• Google Scholar: a great tool for searching academic publications (shows patents, too).
• Google Patents: a great tool for searching US patents.

You can choose either "S-89.3580 Audio Signal Processing Seminar" (3 cr) or "S-89.4820 Postgraduate Course in Audio Signal Processing" (8 cr). There are differences in requirements and the amount of work between the two courses.

The seminar (S-89.3580) is targeted for students working for the Master's degree in acoustics, audio signal processing, or digital signal processing. The requirements are attendance, learning diaries, seminar paper, seminar presentation, and peer feedback.

The Postgraduate Course (S-89.4820) is for students with a Master's degree. On top of the seminar requirements, they will carry out a special assignment and write a report.

• Please browse Noppa.
• Wednesday 9.12.2009 9.15 - 15.00 (about) Conference day: all student presentations will be given during one day. The conference will take place in meeting room Edison (Otakaari 7 A, behind Restaurant Electra).

The students will discuss the seminar topics and plan the contents and coverage of their papers and presentations in small teams. However, within the team, each student will write his/her seminar paper and presentation slides individually. For each team, a team leader will return the draft versions of the deliverables (papers and presentation slides) of his/her team and compile the team member's presentation slides into a single slideshow. All the student presentations will be done on a fixed conference day, on Wed 09.12.2009.