Up to now, we have focused on introducing techniques for synthesis while ignoring some theoretical underpinnings. In this class, we will take a more formal look at sampling and the representation of continuous signals using discrete digital information.
Slides, code_6.sal - examples
Feb 17
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Programming techniques
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Listening session
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Feb 19
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Perception Basics |
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Acoustics Basics |
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Digital Audio Effects in Nyquist |
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Listening
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Project 6 due Feb 25, 10PM
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Make a composition (about 1 minute) using granular synthesis and/or by using Nyquist to cut/splice/reassemble a sound file. |
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Details: All of the comments for Project 5 apply and may help you to plan your work. You do not have to work exclusively with Nyquist. You may use other programs including audio editors (Audacity or other) to manipulate, organize, and mix sounds. You must, however, feature processing of sounds using Nyquist, and you must submit the Nyquist code that you use for this piece. It is recommended that you use sounds that you did not create with Nyquist as a source that you manipulate and process with Nyquist. You must also submit a short narrative description of your piece: what are you trying to achieve, how did you process sound, and what other software (if any) did you use? |
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Example: I used granular synthesis to dice and slice a collection of voices. I did something similar with some nature sounds from a sound effects CD and again with some noise from a waterfall. I mixed the results in Audacity. Here is an mp3 file of the result. |
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Grading: In grading the homework, we will be looking for the development and organization of sounds. In general, a composition that shows evidence of effort will do well. If you simply string together a bunch of sounds with slight modifications and without much thought for the overall composition, you will not do as well. While you may have focused on pitch and duration in previous work, this assignment calls on you to think in terms of texture. The compositional approach is similar, but you'll be working with the variation of new parameters such as grain size, density, and uniformity. For ideas on how to vary your sounds, take a look at the code examples. In addition, your Nyquist code should be clean and easy to read. Comment your code. If you do not use Nyquist for the final product, you should indicate what the code actually generates and how it was used in the piece. |
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Submitting your homework: You need to submit three things: -Your text description, named project06.txt -Your lisp code, named project06.sal -Your resulting wav file, named project06.wav Submit this to your proj-06 directory as usual. |