Encyclopedia > Perfect fourth

  Article Content

Perfect fourth

The musical interval of a perfect fourth is the relationship between the first note (the root or tonic) and the fourth note in a major scale.

It can be produced by starting on a high note and playing the fourth below or by starting on a low note and playing the fourth above.

An "ideal" perfect fourth in just intonation corresponds to a pitch ratio of 3:4 or 1:1.333...

In an equal tempered tuning, a perfect fourth is equal to five semitones, a ratio of 1:25/12 or approximately 1:1.3348.

Compare with: perfect fifth



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
Jamesport, New York

... or Latino of any race. There are 605 households out of which 26.1% have children under the age of 18 living with them, 60.7% are married couples living together, 8.8% ...

 
 
 
This page was created in 37.5 ms