These differences are perceived as tone colour, or timbre. TimbreĪs the frequency of a sound is determined only by its peaks the shape of the wave in between can vary. Your browser does not support the audio element. Notice that all 3 repetitions of the melody have the same musical effect despite differing in pitch. The yellow key is an octave above the green. In the following diagram the blue key sounds a note an octave above (double the frequency) of the red key. Your browser does not support the Web Audio API and/or Canvas API which are required by this tool. When a note sounds in multiple octaves the highest is heard as the melody and the lower ones create a richer tone.ĬG F2 G2 AG | FG A2 G2 C2 | cg f2 g2 ag | fg a2 g2 c2 |Ĭ,G, F,2 G,2 A,G, | F,G, A,2 G,2 C,2 | You can also play a sequence in two or more octaves at the same time. If you pick any key within one octave and play a tune, then play the same sequence from that key in a different octave it will sound like the same tune. This grouping can be identified easily by looking at the black keys, which are grouped into twos and threes.
The keyboard simply repeats these same 12 notes from left to right. After note 12, it returns to note 1 an octave higher or double the frequency. Western music divides the octave into 12 notes, 12 sequential white and black keys. This repetition exists on all instruments but is most obvious on the piano keyboard. If the high wave is again doubled, now 4 times the frequency of the first, all 3 are perceived equivalently.īecause of this the notes used in music repeat. Incidentally the phenomenon is not limited to a single doubling. When two notes sound and one is exactly double the frequency of the other the human mind perceives both with the same tone. High points represent pressure fronts and the low points represent the low pressure regions between them.Īll waves have a frequency, the number of peaks or troughs that pass a point in space in 1 second. These waves can be visualised as a graph. When they reach your ears you hear a sound. Waves to travel through the air much like those on the surface of a pond. When you play an ocarina the air entering and leaving the chamber pushes on the air in your environment. Things fall into place once you put them into practice. As you read this apply what you have learned to any instruments you have at your disposal.
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