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copied!<p>The <a href="http://audacity.sourceforge.net/" rel="nofollow">Audacity</a> <a href="http://audacity.sourceforge.net/manual-1.2/tutorial_basics_1.html" rel="nofollow">tutorial</a> is a good place to start. Another <a href="http://www.pgmusic.com/tutorial_digitalaudio.htm" rel="nofollow">introduction</a> that covers similar ground. The <a href="http://puredata.info/" rel="nofollow">PureData</a> <a href="http://en.flossmanuals.net/pure-data/ch003_what-is-digital-audio/" rel="nofollow">tutorial at flossmanuals</a> is also a good starting point. <a href="http://en.wikipedia.org/wiki/Digital_audio" rel="nofollow">Wikipedia</a> is a good source once you have the basics down.</p> <p>Audio is input into a computer via an <a href="http://en.wikipedia.org/wiki/Analog-to-digital_converter" rel="nofollow">analog-to-digital</a> converter (ADC). Digital audio is output via a <a href="http://en.wikipedia.org/wiki/Digital-to-analog_converter" rel="nofollow">digital-to-analog</a> converter (DAC).</p> <p>Sample rate is the number of times per second at which the analog signal is measured and stored digitally. You can think of the sample rate as the time resolution of an audio signal. Bit size is the number of bits used to store each sample. You can think of it as analogous to the color depth of an image pixel.</p> <p><a href="http://www.music.utah.edu/faculty/faculty_a-z/david_michael_cottle" rel="nofollow">David Cottle's</a> <a href="http://supercollider.sourceforge.net/" rel="nofollow">SuperCollider</a> book also has a <a href="http://supercolliderbook.net/" rel="nofollow">great introduction</a> to digital audio.</p>

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