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The Music Tech Dictionary: A Glossary of Audio-Related Terms and Technologies by Mitch Gallagher

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Chapter . Q

Q. Short for quality factor, a.k.a. resonance. The term Q is often used interchangeably with bandwidth, but in fact Q determines the bandwidth. The sharper (higher) the Q, the narrower the bandwidth, and vice versa. 1. Q refers to the sharpness of a resonant peak in a synthesizer filter. 2. In equalizers, Q is the center frequency divided by the half-power bandwidth. If an EQ band has a center frequency of 250 Hz and the bandwidth at half power is 100 Hz, the Q is 2.5. 3. In speakers, Q refers to directivity, or how energy is dispersed from the driver. A speaker Q of 1 indicates equal energy dispersed in all directions. A speaker Q of 2 indicates 180-degree dispersion; the higher the Q, the narrower the dispersion.

quad core. A single ...

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