| A | B |
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| pitch | In the context of music, a fundamental quality of sound. A plucked string vibrates to produce a certain pitch. The shorter the string, the higher the pitch. |
| frequency | The number of times a sound wave alternates within a given interval of time. With a plucked string, for example, the number of times the string vibrates up and down within a particular amount of time. |
| cycles per second (cps) | A measurement of frequency. Specifically, the number of times a sound wave alternates in a second. With a |
| fundamental frequency | The number of cycles per second at which a string vibrates when plucked at its full length. |
| octave | The change in pitch that results from the doubling of a frequency. |
| scale | The musical tones that span an octave. |
| half-step | The frequency separating each note of the 12 tone scale. |
| wave | In the context of sound, the alternating compression and expansion, ridges of high and low pressure, of air. It is the means by which sound propagates. |
