This paper explains the methods and techniques used to build a fully functional audio synthesizer and FFT-based audio visualizer within the newest version of Flash CS3. Audio synthesis and visualization have not been possible to achieve in previous versions of Flash, but two new elements of ActionScript 3.0 – the Byte Array and Compute Spectrum function – make it possible even though it is not included in Flash’s codebase. Since Flash is present on 99% of the world’s computers, this opens many new opportunities for audio on the web.
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