Audio DSP from Scratch for Students of Computing
The paper presents a set of dedicated programming applications for teaching digital audio basics to the novices with the background in computing. These applications have been used in the Institute of Computing Science Poznan University of Technology for over 15 years. Each application is devoted to an individual subject, is self explanatory, illustrates the given topic and includes several simple problems to be solved by students. The topics include: the idea of signal energy and RMS, signals orthogonality, signals approximations, simple sinusoidal synthesis, spectrum, sampling theorem, upsampling and downsampling, convolution, idea of digital filters and interpretation of frequency characteristics, FIR and IIR filters - their zeroes and poles, windowing, DFT and its time and frequency resolution, cepstral analysis and others. This set of programs proved useful as a starting point to more advanced audio projects in the domain of MIR, speech and speaker recognition, speech synthesis, audio coding and others.
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