Digital audio is audio, or simply sound, signal that has been recorded as or converted into digital form, where the sound wave of the audio signal is encoded as numerical samples in continuous sequence, typically at CD audio quality which is 16 bit sample depth over 44.1 thousand samples per second.
An electronic keyboard or digital keyboard is an electronic musical instrument, an electronic or digital derivative of keyboard instruments.
A harmonic is any member of the harmonic series, a divergent infinite series.
High fidelity (often shortened to hi-fi or hifi) is a term used by listeners, audiophiles and home audio enthusiasts to refer to high-quality reproduction of sound.
A keyboardist is a musician who plays keyboard instruments.
Moog Music is an American company based in Asheville, North Carolina which manufactures electronic musical instruments.
Music theory is the study of the practices and possibilities of music.
NewBay Media, LLC is a magazine and website publisher founded in 2006 and headquartered in New York City.
Philosophy of music is the study of "...fundamental questions about the nature of music and our experience of it".
San Bruno is a city in San Mateo County, California, United States, incorporated in 1914.