Which tuning system has dominated Western music since the mid-18th century?

Which tuning system has dominated Western music since the mid-18th century?

• A. Just intonation
• B. Equal temperament tuning
• C. Pythagorean tuning
• D. Meantone temperament

Answer: (B)

Equally tempered tuning became the standard because it lets music move through many keys with similar-sounding intervals. By dividing the octave into 12 equal steps, each semitone is the same size, so a fixed instrument like a keyboard can play in any key and modulate freely without sounding badly out of tune. This practicality matched the growing emphasis on key changes in Western music and the need for consistent intonation across all pieces. Other systems aim for purer consonances in specific keys. Just intonation yields perfect intervals in one key but they drift when you shift keys. Pythagorean tuning keeps strong fifths but gives off perfect-sounding thirds, especially in keys with many accidentals. Meantone temperaments improve thirds but restrict you to a limited set of keys and can require retuning for others. Equal temperament avoids these key-specific trade-offs, which is why it came to dominate.

Equally tempered tuning became the standard because it lets music move through many keys with similar-sounding intervals. By dividing the octave into 12 equal steps, each semitone is the same size, so a fixed instrument like a keyboard can play in any key and modulate freely without sounding badly out of tune. This practicality matched the growing emphasis on key changes in Western music and the need for consistent intonation across all pieces.

Other systems aim for purer consonances in specific keys. Just intonation yields perfect intervals in one key but they drift when you shift keys. Pythagorean tuning keeps strong fifths but gives off perfect-sounding thirds, especially in keys with many accidentals. Meantone temperaments improve thirds but restrict you to a limited set of keys and can require retuning for others. Equal temperament avoids these key-specific trade-offs, which is why it came to dominate.