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#41
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Arny Krueger wrote: Having access to a computer, soundcard and microphone requires none of those things. Yet many still think their results are beyond reproach. Chauvenism aside, the results one gets with intelligent procedures, intelligent equipment choices, and the use of a computer, soundcard and microphone does serve one's technical interests a whole lot better than a 10-band audio analyzer. So, you say that good technical measurements require the following ingredients: 1. Intelligent procedures 2. Intelligent equipment choices I would agree. I would further point out that the majority of audio measurements are done using, at most, only one of the two above. Thus, having made "intelligent equipment choices" does NOT, as suggested, automatically mean that the results are better than some random 10-band real-time analyzer. Case in point: a modern PC and sound card choice running FFT- based software can easily show that a stable, very low distortion sine wave has lots of sideband distortion and jitter, simply because the person running it doesn't understand the issues of window edge discontinuity and proper windowing techniques. The very same signal, measured two different ways, could exhibit itself as a pure, single-bin spike or something with wide, shallow skirts that extend to the band edges, all because of differences in procedures. In the hands of someone who does NOT understand these sorts of subtleties, I would argue, based not only on theory but on watching people doing it, that they're probably better off with the equivalent of a 1/3 or 1/2 octave real-time analyzer. |
#42
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"Arny Krueger" wrote in message ... Chauvenism aside, An extreme interpretation. the results one gets with intelligent procedures, intelligent equipment choices, and the use of a computer, soundcard and microphone does serve one's technical interests a whole lot better than a 10-band audio analyzer. The results one gets with either need to be interpreted properly and not taken as gospel. Some knowledge and experience is usually required. MrT. |
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