A substance formulated to remove oxides from electrical contacts. (cf. Contact Cleaner)

A device for reducing the effect of sibilance in vocal signals.

A system which restores the spectral balance to correct for pre-emphasis.

Disc Description Protocol. A data description format used for specifying the content of optical discs including CD, and used almost universally now for the delivery of disc masters to duplication houses. A DDP file contains four elements: the Audio image (.DAT); the DDP identifier (DDPID), the DDP Stream Descriptor (DDPMS); and a subcode descriptor (PQDESCR). Often an extra text file is also included with track titles and timing data. Many DAWs and audio editing programs can now create DDP files.

An abbreviation of Digital Delay Line, used to create simple delay-based audio effects.

Digitally Controlled Oscillator. Used in digitally-controlled synthesizers.

A manufacturer of audio processing equipment, most notably compressors and tape noise reduction systems. The DBX NR systems were commercial encode/decode analogue noise-reduction processors intended for consumer and semi-pro tape recording. Different models varied in complexity, but essentially DBX compressed the audio signals during recording and expanded them by an identical amount on playback.

A stationary-head digital recorder format developed by Philips, using a bespoke cassette medium similar in size and format to Compact Cassettes. It used an MPEG data reduction system to reduce the amount of data that needs to be stored.

See VCA Group

Digitally Controlled Amplifier. The digital equivalent of a VCA often found in digital synthesisers and mixing consoles.