Chapter | eighteen


Polarity and Phase Reading




The Phase Meter

Integration Time

Goniometer – Audio Vector Oscilloscope

Spectral Phase Display


In the production, recording, and transmission of stereo signals, it is not just the levels of the signals in relation to each other that need to be monitored, but also the polarity or phase relationship between them. This chapter describes some important instruments that are used for this purpose.


Polarity is a question of the audio signals being “in phase” or “out of phase,” meaning the positive parts of the waveform become negative and the negative becomes positive. If only looking at – or listening to – one channel (mono) audio being 180° out of phase, it is not ...

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