The interval of eight diatonic degrees between two tones of the same name, the higher of which has twice as many vibrations per second as the lower.
Eight notes in an octave.
octave
An interval of eight notes is known as an octave.
THE ANSER IS 8 NOTES IN A LINE YOU MUMPET
Octave
To play a musical note an octave lower, you can simply press the key or string that corresponds to the same note, but in a lower register. This will produce a sound that is one octave lower than the original note.
It is known as an Octave (a musical scale of eight notes).
8va. Also, "8".
Octave
An octave is exactly 8 notes apart, so that each note comprising the octave is the same (eg an octave could be from C to C). The word "octave" is based on the root "octo", meaning 8.
An octave.... 0.0
The coordination of hands, octave range, and mental focus can enhance musical performance by improving technical skill, expanding musical expression, and maintaining concentration throughout the performance.