Tuesday, September 04, 2007

Week 6: mid way

Creative Computing: Physical Modelling

'Physical modeling' refers to the use of computers to model or simulate the sounds of traditional musical instruments or any analogue sound.
"There are two different general methods for synthesis of musical instrument sounds. One approach is to look at the spectrum of a real instrument and try to recreate it. This includes methods such as additive synthesis and frequency modulation (FM). These produce sounds with similar structure, but the parameters involved have no relation to the physical parameters of an instrument. The other popular approach is to use a sample of the instrument, such as in wavetable synthesis and samplers. In both of these cases, you're creating sounds without any consideration for how the real instrument actually creates those sounds.

"Karplus-Strong string synthesis is a method of physical modelling synthesis that loops a short waveform through a filtered delay line to simulate the sound of a hammered or plucked string or some kind of percussion . This is a subtractive synthesis technique based on a feedback loop similar to that of a comb filter."


* Haines.Christian."Workshop-6-sem2 conducted on Physical Modelling - Karplus-Strong string synthesis.Programming with SuperCollider".30 August 2007.Electronic Music Unit.University of Adelaide, South Australia.
* Anon. 2007, Karplus-Strong string synthesis, 2007, .
* "Tutorial 9". IXI 2007, Software, IXI, 11/1, .
"Chapter 16". Cottle, David Michael 2005, Computer Music (with examples in
SuperCollider 3).

Audio Arts : Film Concepts
Feedback is the signal that is looped back to control a system within itself. This loop is called the feedback loop. A control system usually has input and output to the system; when the output of the system is fed back into the system as part of its input, it is called the "feedback."
In cybernetics and control theory, feedback is a process whereby some proportion of the output signal of a system is passed (fed back) to the input. This is often used to control the dynamic behavior of the system.

My work is based on feedback theory and digital manipulations. Visuals are generated by the process of video feedback which are then manilulated by using various filters. The end result will be of collarge of various shots and filtered result applied to the generated feedback.
(my film analysis coming soon)

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