Cut | To reduce a signal’s overall amplitude. |
D to A | Digital to Analog. Conversion of a digital representation to an analog |
| equivalent signal. |
dBFS | Decibels with respect to digital full scale. The full scale amplitude (zero dBFS |
| value) is the peak value of a sinewave whose positive or negative peak just |
reaches | full scale. |
dBm | dB relative to a reference value of 1 milliwatt. dBm is thus a power unit and |
| requires knowledge of power levels (voltage and current, voltage and |
| impedance, or current and impedance) rather than just voltage. |
dBr | Relative dB; dB relative to an arbitrary reference value. The reference value |
| must be stated for this to be a meaningful unit. |
dBu | dB relative to a reference of 0.7746 Volts. Since 0.7746 Volts is the voltage |
| across a 600 Ohm resistor when one milliwatt is being dissipated in that |
| resistor, dBu and dBm are numerically equal in a 600 Ohm impedance |
| environment. |
dBV | dB relative to a reference value of 1 Volt. |
Delay | The interval between the instant at which a signal or force is applied or |
| removed and the instant at which a circuit or device subsequently responds in |
| a specified manner. |
Dither | The reduction of bits in a digital audio signal for use on a target system that |
| uses a smaller number of bits than the originating system. |
DSP | Digital Signal Processing. The art and science of digitally encoding analog |
| signals producing raw data, performing one or more mathematical routines on |
| the raw data to produce final data for use by other digital systems, and/or |
| conversion back to analog signals. |
Filter | A circuit or device which passes one frequency or frequency band while |
| blocking others, or vice versa. |
Filter attenuation | In a selective filter, the power, current, or voltage loss, in decibels, that takes |
| place within the passband. |
Filter attenuation band | The frequency band rejected by a |
Filter cutoff | The frequency at which the transmission figure of a filter is below its maximum |
| value by a prescribed amount (typically |
Filter pass band | The frequency band defined by the upper and lower cutoff frequencies of a |
| bandpass filter. |
Filter stop band | The attenuation band of a |
| ATTENUATION BAND. |
Gain | See BOOST |
