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Audio Melody Contour Extractor Field Guide: When Five Knobs Decide Which Polyphonic Voice Becomes the MIDI Line

Posted by By xiezixing 2026年10月14日
Five control knobs in the Audio Melody Contour Extractor decide which competing voice in polyphonic audio becomes the dominant MIDI line: onset threshold, frame threshold, minimum note length, melody preference, and pitch bends.
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Decibel Calculator Field Guide: When Ten Formulas, Six Absolute Scales, and One Reference Impedance Decide Whether Your Number Means Anything

Posted by By xiezixing 2026年9月6日
Audio engineers, RF designers, and acoustic analysts all use the same word — “decibel” —…
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Audio Non-Silence Detector: The Three Numbers That Decide Which Parts of Your Audio Actually Contain Sound
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Audio Non-Silence Detector: The Three Numbers That Decide Which Parts of Your Audio Actually Contain Sound

Posted by By xiezixing 2026年6月27日
Most audio tools answer one question at a time. The Audio Non-Silence Detector answers the…
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Why Every Periodic Function Hides Inside Circles — Fourier Series epicycle visualization
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Why Every Periodic Function Hides Inside Circles

Posted by By xiezixing 2026年6月2日
In 1807, Joseph Fourier submitted a paper to the French Academy claiming something that made…
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Why Every Oscillating System Has the Same Frequency Grammar
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Why Every Oscillating System Has the Same Frequency Grammar

Posted by By xiezixing 2026年6月2日
The Frequency Where Everything Cancels Tune a radio. You hear one station, not the hundred…
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Why Square Waves, Sawtooth Waves, and Triangle Waves Are All Made of the Same Thing
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Why Square Waves, Sawtooth Waves, and Triangle Waves Are All Made of the Same Thing

Posted by By xiezixing 2026年5月7日
Why Square Waves, Sawtooth Waves, and Triangle Waves Are All Made of the Same Thing…
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Why Square Waves Are Made of Circles (And What That Reveals About Reality)
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Why Square Waves Are Made of Circles (And What That Reveals About Reality)

Posted by By xiezixing 2026年5月7日
Why Square Waves Are Made of Circles (And What That Reveals About Reality) The square…
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The Heisenberg Uncertainty Principle of Sound: Why You Can’t Have Perfect Time and Frequency Resolution
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The Heisenberg Uncertainty Principle of Sound: Why You Can’t Have Perfect Time and Frequency Resolution

Posted by By xiezixing 2026年5月3日
The Heisenberg Uncertainty Principle of Sound: Why You Can't Have Perfect Time and Frequency Resolution…
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The Four-Line Math That Makes Every Photo Filter, Audio Effect, and AI Vision System Work
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The Four-Line Math That Makes Every Photo Filter, Audio Effect, and AI Vision System Work

Posted by By xiezixing 2026年4月28日
The Four-Line Math That Makes Every Photo Filter, Audio Effect, and AI Vision System Work…
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The Hidden Math Behind Every Audio App You Have Ever Used
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The Hidden Math Behind Every Audio App You Have Ever Used

Posted by By xiezixing 2026年4月19日
The Hidden Math Behind Every Audio App You Have Ever Used Open Spotify's desktop app.…
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