Chapter 24
Test Procedures
Chapter 2 explained how audio devices are measured by professionals using modern test gear. Sadly, many people can’t afford $10,000 or more for a precision analyzer, or even $400 for a basic oscilloscope. But there are many tests you can do yourself without measuring equipment. For example, the Wave files included with Chapter 3 let you assess the audibility of low-level artifacts just by listening through your own speakers or headphones. That chapter also explained how the FFT display available in many audio editor programs shows harmonics and noise at levels too soft to hear. As explained in Chapter 8, to measure the distortion of 32-bit floating point “summing” math used by most DAW software, I applied 30 sequential ...
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