Re: SimpleP48 -- Polarity
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Henry- Polarity is certainly audible. But for that to be the case the audio waveforms need to be asymmetrical and the reproduction environment must have minimal reverberation. Many years ago I had created a test signal for testing the polarity of gear.? It was 440 Hz with 50% second harmonic. I found that I could easily detect an inversion. What it sounded like was that the level changed and the timbre sounded different. At work the next day I gathered ten volunteers and nine of them could always detect the polarity change. The tenth volunteer turned out to be tone deaf! He liked to listen to music but he couldn't tell if one note was higher than another.
I was going to write a paper on this but there is a definitive discussion of this subject by Lipshitz and Vanderkooy in?"On the Audibility of Midrange Phase Distortion in Audio Systems" J. Audio Eng. Soc ., vol. 30, 1982).?
Sorry for being dense, but I wanted to seek some clarity on the SP48 polarity question. It sounds like Jules' SP48 mics are of normal conventional polarity with capsule + to pin 3, and all ~10 of mine are also wired that way and show conventional polarity... was there resolution on this question and I missed it? I don't feel comfortable when the bible of SP48 (Ricardo's PDF) disagrees with my circuits. :-)
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