AudioScope
Why does a phaser sound like it sweeps?
Listen to the same sound twice. A is dry. B blends it with a phase-shifted copy.
Listen for the moving dips
When the two signals meet, some frequencies cancel. Changing the filter moves those dips through the sound. The moving light illustrates the calculated response.
Both examples are matched in digital RMS. Listen at a comfortable level.
AudioScope created the source and the four-stage digital phaser. Read Julius O. Smith’s explanation of all-pass phasing.
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