 | In music, an octave (sometimes abbreviated 8ve or P8) is the interval between one musical pitch and another with half or double its frequency. For example, if one note has a frequency of 400 Hz, the note an octave above it is at 800 Hz, and the note an octave below is at 200 Hz. The ratio of frequencies of two notes an octave apart is therefore 2:1. |
| There is an octave key (see photo) on a saxophone which raises the pitch of all notes by an octave when pressed. It is positioned next to the left thumb rest. Pressing the octave key will open either the top tone hole in the neck of the saxophone, or, whenever the G key is fingered, the top tone hole will close and a small tone hole will be opened near the top of the body. | |
Chromatic scale, C major scale (4 octaves), and a typical pattern streching it to the top tones of the saxophone. 4 Octave D blues on tenor sax | |
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