Department of Computer Science, Unit Catalogue 2009/10 |
CM30142: Music & digital signal processing |
 Credits:
| 6 |
| Level:
| Honours |
| Period: | Semester 1 |
| Assessment:
| CW 25%, EX 75% |
| Supplementary Assessment: | CM30142 Mandatory Extra Work (where allowed by programme regulations) |
| Requisites:
| Before taking this unit you must (take CM10134 and take CM10135 and take CM20144) or (take CM10227 and take CM10228 and take CM20217) |
| Description: | Aims: To introduce the basic ideas of DSP programming and the ways in which musical signals can be treated as data. Learning Outcomes: 1. To be able to code simple digital filters, and construct simple oscillators; 2. To be able to control a frequency domain analysis and resynthesis; 3. To be able to use three synthesis methods. Skills: Application of Number (T). Content: Introduction: Musical signals: their nature, characterisation and representation. Pitch, amplitude and timbre. PCM representation: sampling and quantisation errors. MIDI representation and its limitations. Software Systems: Music5 family: Csound. Additive Synthesis: Simple oscillators and their coding; wavetable synthesis. Helmholz theory and Fourier analysis. Subtractive Synthesis: Noise, and digital filters. Filter types, IIR and FIR. Issues in filter design. Psycho-acoustics: Basic ideas and Shepard tones as an example. Lossy compression. MPEG level 2. Time and frequency domains: Phase vocoding. FFT and IFFT; analysis and resynthesis. Pitch changing. Physical Models: The wave equation. Delay lines and wave guides. The plucked string. FM and non-linear synthesis: Analysis and coding of FM. Introduction to Granular Synthesis, formants and FOF. Pitch changing. Spacialisation: Stereo panning, reverberation, localisation and audio clues. Composition: Process based, algorithmic composition. Pitch and Tuning: ET and Just. |