Intervals
Melodic Interval
Distances between tones are measured in intervals, called $2$nds, $3$rds, $4$ths, $5$ths, etc.
Notes playes separately make a melody, and we call the intervals between these notes melodic intervals.
Harmonic Interval
Notes played together make harmony. We call the intervals between these notes harmonic intervals.
Melodic Intervals in Do Position
Harmonic Intervals in Do Position
Melodic Intervals in Sol Position
Harmonic Intervals in Sol Position
6ths
When you skip 4 white keys then the interval is a 6th.
7ths
When you skip 5 white keys then the interval is a 7th.
Octave
When you skip 6 white keys then the interval is an octave.