Course detail
Audio Electronics
FEKT-BPC-AUDAcad. year: 2025/2026
Students become familiar with fundamentals of analog and digital low-frequency and audio signal, then with functionality and design of the pre-amplifiers, correction amplifiers, power amplifiers and filters. The course continues by explanation of sampling, quantization and coding in the area of audio with principles of the audio compression. Emphasis is put on explanation of principles of source coding, error corrections and methods for suppression of the signal degradation with record and playback. Students acquire knowledge of the methods for record and playback in the systems without and with reduction of the bit rate of the audio.
Language of instruction
Number of ECTS credits
Mode of study
Guarantor
Department
Entry knowledge
Rules for evaluation and completion of the course
The content and forms of instruction in the evaluated course are specified by a regulation issued by the lecturer responsible for the course annually.
Aims
The graduate is able to:
- explain principles of analog and digital low-frequency and audio signal transmission
- describe sources and sinks of low-frequency and audio signal
- design appropriate pre-amplifier, correction amplifier, power amplifier of audio filter
- explain principles of sampling, quantization and coding of the sound and audio signals
- explain principles of bit rate compression of the digital sound and audio signals
- characterize system for the record and playback without and with audio compression
- measure parameters of analog and digital audio system or amplifier
Study aids
Web BUT, course BPC-AUD: https://www.vut.cz/studenti/predmety/detail/268602
Prerequisites and corequisites
Basic literature
METZLER, B. Audio Measurement Handbook. Audio Presision, Inc., 1993. Audio Precision document number 0058.0003 r1. (EN)
POHLMAN, K. C. Principles of Digital Audio (Sixth Edition). McGraw-Hill, 2010. ISBN 978-0071663465. (EN)
ŠŤÁL, P. Výkonové audio zesilovače pracující ve třídě D. BEN - technická literatura, Praha, 2008. ISBN 978-8073002305. (CS)
WIRSUM, S. Abeceda nf techniky. BEN - technická literatura, Praha, 2003. ISBN 978-8086056265. (CS)
Recommended reading
Classification of course in study plans
- Programme BPC-AMT Bachelor's 0 year of study, summer semester, elective
- Programme BPC-AUD Bachelor's
specialization AUDB-ZVUK , 3 year of study, summer semester, compulsory
specialization AUDB-TECH , 3 year of study, summer semester, compulsory - Programme BPC-ECT Bachelor's 2 year of study, summer semester, compulsory-optional
- Programme BPC-IBE Bachelor's 0 year of study, summer semester, elective
- Programme BPC-MET Bachelor's 3 year of study, summer semester, compulsory-optional
- Programme BPC-SEE Bachelor's 0 year of study, summer semester, elective
- Programme BPC-TLI Bachelor's 3 year of study, summer semester, compulsory-optional
- Programme BIT Bachelor's 2 year of study, summer semester, elective
- Programme BIT Bachelor's 2 year of study, summer semester, elective
Type of course unit
Lecture
Teacher / Lecturer
Syllabus
1. Low-frequency signals, transmission and recording, processing and reproduction of audio.
2. Principles of electroacoustics and electroacoustic transducers - microphones and loudspeakers.
3. Classes and properties of amplifiers for low-frequency electronics (A, AB, B, D, T).
4. Preamplifiers for audio, input switching, physiological volume control.
5. Correction amplifiers and multi-band filters, depth and height correction, equalizers.
6. Final and power amplifiers, digital amplifiers with PWM modulation and ZV.
7. Digital processing of low-frequency signals, A/D with D/A converters, DSP.
8. Digital recording without data flow reduction (PCM, CD-Audio, SACD, DVD-Audio).
9. Digital recording with data flow reduction (MiniDisc, MPEG, Dolby Digital, DTS).
10. The principle of audio signal compression (MP3, ACC, WMA, OGG, ATRAC and others).
11. Standards for DAB/DMB digital radio broadcasting.
Laboratory exercise
Teacher / Lecturer
Syllabus
1. Input audio amplifier with adjustable sensitivity and RIAA correction.
2. Depth and height correction amplifier with physiological correction.
3. Digital power amplifier in class T with PWM.
4. Stereophonic active crossover for satellites and subwoofer with adjustable frequency.
5. The principle of a digital power amplifier in class D and PWM modulation.
6. Digital multi-band equalizer and limiter for audio signal controlled by PC.
7. A/D and D/A conversion of a low-frequency signal with optional conversion parameters.
8. Measuring the D/A converter of a CD player with an Audio Precision audio analyzer.