What is Octave?
{{distinguish|GNU Octave}} An '''octave''' is the distance between two [[musical note]]s that have the same letter name. If a musician sings or plays a [[Scale (music)|scale]] (‘do-re-mi-fa-sol-la-si-do’) the first and last ‘do’ are an octave apart. It is called an ‘octave’ because there are eight notes in a scale (‘octo’ is [[Latin]] for ‘eight’). If a musician sings or plays the first two notes of the song “Somewhere over the rainbow” (i.e. the word ‘Somewhere’) these two notes are an octave apart. Two notes that are an octave apart sound very similar, almost like the same note. The scientific reason for this is that the top note [[vibration|vibrates]] twice as fast. For example: if someone plays [[Middle C]] on a [[piano]], a hammer hits the Middle C strings inside and makes them vibrate 256 times a second. The C an octave higher will vibrate 512 times a second. Young children who learn the piano will not be able to stretch an octave with one hand, if their hands are too small. Most adults can stretch an octave easily (playing one note with the thumb, and the other with the little finger). ==Related pages== *[[Interval (music)]] {{music theory}} [[Category:Music theory]]