Labels:bulletin board | daily | reckoner | sky OCR: ABOUT INTERYALS An interval is the perceived distance bet tween two pitches. If two pitches are identical they in unison. If they belong to the same pitch- -class then they separated by one or more octaves Since there are twelve pitches within an octave there are twelve possible intervals within an octave The number associ iation describing an interval refers to the number of letter -names invol ved or second even though they have diff ferent size intervals whole step pue 0 c half step A third always spans le .ers fourth spans et ters pue 50 on Sometimes uB interval can have two names because can span to two different letters pue taf sound the same An augmented fourth sounds exactly like dimi- nished fifth because there the same number of steps ir the interval This module a11ows for this o ...