Fundamentals
Scientific Pitch Notation: What C4 Actually Means
Middle C is C4 in scientific pitch notation, C3 on some manufacturers' labelling, and MIDI note 60 in every sequencer. The numbering is a convention.
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Type a chord symbol or a scale name and go straight to it, or search tools, glossary terms and every article. Results are ranked by where the words appear.
Glossary
- FrequencyThe number of complete vibration cycles per second, measured in hertz (Hz), which sets a sound's pitch.
- BeatingSlow pulsations in loudness heard when two close frequencies interfere, at a rate equal to their difference…
- FundamentalThe lowest partial of a sound, whose frequency sets the perceived pitch even when it is weak or missing.
- ResonanceA body or air column vibrating strongly when driven near its natural frequency, which boosts that frequency.
Articles
Tuning & Temperament
What Are Cents? The Unit That Measures Small Pitch Differences
A cent is one hundredth of an equal-tempered semitone. Here is the formula, what the common intervals measure in cents, and what a tuner is showing you.
Tuning & Temperament
Equal Temperament: What It Costs and What It Buys
Twelve equal semitones solve the problem pure intervals create. The cost is small in fifths, large in thirds, and paid by every fixed-pitch instrument.
Acoustics & Sound
The Harmonic Series: Why Octaves, Fifths and Thirds Come First
A vibrating string or air column sounds a fundamental and a set of partials at whole-number multiples of it. Here are the first sixteen, their cents, and where they differ from equal temperament.
Tuning & Temperament
Pythagorean Tuning: How Stacked Pure Fifths Build a Scale
Pythagorean tuning builds every interval from pure 3:2 fifths. Here is the seven-note scale it produces, its whole tones and semitones in cents, and the wolf fifth it leaves behind.
Counterpoint
Parallel Fifths and Octaves: Why the Rule Exists
Parallel fifths and octaves are voices that move together and keep a perfect interval. Here is why strict voice leading forbids them and where the rule bends.
Acoustics & Sound
Timbre and Overtones: Why the Same Note Sounds Different
Timbre is the shape of a note's spectrum: which partials are present, how strong they are and how the sound begins. Here is why a clarinet, a flute and a piano differ on the same pitch.
Orchestration
Instrument Ranges for Arrangers: Playable, Comfortable, Usable
A playable range and a usable register are different facts. Transposition arithmetic, endurance, doubling, and the notes that are another instrument.
Tuning & Temperament
Just Intonation, Beating and Why Intervals Sound in Tune
Pure intervals come from small whole-number ratios, and beating is what stops them sounding pure. What just intonation gives, and what it cannot fix.
Tuning & Temperament
Meantone and Well Temperament: Why Keys Used to Sound Different
Quarter-comma meantone, the wolf fifth and the well temperaments in between: what keyboard tuning did to each key before equal temperament settled the argument.
Harmony
Voice Leading: Why the Rules Exist in Four-Part Writing
Parallel fifths, tendency tones, spacing and doubling, read as solutions to one problem: keeping four lines heard as four lines.