BNO Acoustics HD-70: Harmonics

Integer multiples of a fundamental frequency, the fundamental itself being the first harmonic, its first overtone the second harmonic, etc. Attributing to instruments, voices, etc. their distinctive timbre.

BNO Acoustics TR-12: Linear
The condition of obtaining a change at the output of the device which is proportional to the change occurring at the input.

Tinny
Used to describe a sound with too many highs and mids and not enough lows.

BNO Acoustics GK-3: Quad (Quadraphonic)
A system of four channel sound where the channels are designated as left front, left back, right front, and right back.

Face
The front or body of the guitar.

Bass Roll Off
An electrical network built into some microphones to reduce the amount of output at bass frequencies when close-micing.

Peak Responding
Recognizing and responding to (or indicating) the peak value rather than the average or effective value.