Faculty of Electrical Engineering

Czech Technical University in Prague

CTU in Prague

Subject description - B2M31SYN

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B2M31SYN Synthesis of Audio Signals Extent of teaching:2P+2C
Guarantors:Čmejla R. Roles:P,V Completion:Z,ZK
Teachers:Čmejla R.
Responsible Department:13131 Credits:6 Semester:Z

Anotation:

This course introduces the fundamentals of sound synthesis algorithms (everyday, music and speech), digital audio effects and sonification. Multimedia synthetic signals are used in modern digital systems, virtual reality systems, computer animations, games and film. Understanding of theoretical concepts will be consolidated through practical programming assignments in Matlab.

Course outlines:

1. Introduction to digital audio signal synthesis; musical scale generator
2. Wavetable synthesis; time expansion and compression, time envelopes
3. Concatenative and granular synthesis; parameters, synchronous and asynchronous
4. Additive synthesis and spectral modelling; periodical nonharmonic signals
5. Phase vocoder; signal modification in frequency domain
6. Subtractive synthesis; excitation sources, simple filters, equalizers, color noise
7. Formant synthesis; Klatt synthesizer, cascade and parallel configuration, FOF
8. Linear prediction; cross synthesis speech and music, non-speech sound modelling
9. Modulation synthesis; AM, tremolo, FM, vibrato, alarm, everyday sounds and tools
10. Nonlinear and waveshaping synthesis; Chebyshev polynomials, limiters, distortion
11. Delay effects; echo, reverb, comb and all-pass filters
12. Spatial effects; Doppler effect, panning, hall, Schroeder?s reverb
13. Introduction to physical modelling; digital waveguides, Karplus-Strong algorithm
14. Sonification of biological signals (ECG, EMG, EEG, FCG, EOG), applications

Exercises outline:

1. Musical scale, Morse code; aliasing, quantization and compression simulation
2. Time and frequency scale modification, clarinet and banjo wavetable synthesis
3. Concatenative speech synthesis, "sci-fi" sound synthesis
4. Birdcall, brass, bells, gongs, cymbals, banjo, cllarinet and phone synthesis
5. Length changes of audio signals, pitch shift, noise enhancement
6. Synthesis of percussion, plane, wind, waves, violin, steps , consonant "s"
7. Formant synthesis of vowels, music instrument and animal voice
8. Speech, guitar, piano and hammer resynthesis; "cross" synthesis music and speech
9. Vibrato, tremolo, coins, bubles, alarms, klepání, dřevo, klarinet, žestě, zvony
10. Application of waveshaping to plucked string instruments, percussion and speech
11. Digital reverb implementation (cellar, shover, cathedral)
12. Spatial effects in sérech and music
13. Guitar, harp, piano and drums synthesis
14. Sonification of EEG, ECG, FCG, EMG

Literature:

Miranda, E.R.: Computer Sound Design, ISBN 0-240-51693-1, Focal Press, Oxford, 2002 Zölzer, U.: DAFX - Digital Audio Effects, ISBN: 0-471-49078-4, John Wiley & Sons, 2002

Requirements:

Webpage:

http://sami.fel.cvut.cz/sms/ http://sami.fel.cvut.cz/sms_eng/

Keywords:

Sound syntesis

Subject is included into these academic programs:

Program Branch Role Recommended semester
MPEK3_2016 Electronics V
MPEK1_2016 Communication Systems and Networks V
MPEK2_2016 Radio and Optical Technology V
MPEK4_2016 Media and Signal Processing P 1


Page updated 19.10.2017 17:48:42, semester: L/2016-7, Z,L/2017-8, Z/2018-9, Send comments about the content to the Administrators of the Academic Programs Proposal and Realization: I. Halaška (K336), J. Novák (K336)
Responsible person: doc. Ing. Jiří Jakovenko, Ph.D.