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Glossary

MPEG Motion Picture Expert

Group. A standard for video sequence

compression. You can play back

MPEG files from the WEB or a video

CD-ROM.

MPU-401 MIDI interface hardware

standard developed by the Roland Co.

OLE Object Linking and Embedding.

A Windows feature that allows

different object types (such as speech

clips or notes of music) to appear in a

document. The objects can be linked,

in which case they remain separate

files, or embedded, where they

become part of the document.

Patch A MIDI term referring to a

particular sound or voice.

PCM Pulse Code Modulation, a

method of storing uncompressed

digital audio. The audio is

represented by the amplitude of the

audio signal sampled at regular

intervals.

Polyphonic More than one voice

played simultaneously.

Q-Sound Audio-processing

technique to simulate

reverb/surround sound.

Sampling The process of converting

an analog signal into digital data.

Sampling rate The rate of analyzing

a sound. The more frequently a sound

is sampled, the more closely it will

match the original sound.

Sequencer A device used to record

note information from MIDI devices.

Sound files Files containing sound

data. Sound files are usually stored in

one of four formats, with the

extension .WAV, .MID.

Synthesizer Hardware for

generating audio from software.

Typical methods used are FM

synthesis and wave table synthesis.

Total harmonic distortion A

specification for quantifying the

fidelity of audio processing

equipment.

Tracks The virtual tracks used by

MIDI sequencers.

Voices The number of synthesized

sounds that a device can generate

simultaneously.

WAV files A Microsoft file format for

storing digital audio data.

Wavesample A sample used in a

wavetable or sampling synthesizer to

reproduce a musical instrument

sound.

-law A method of data compression

that enables the sampling of sound at

a resolution of 16 bits, but that

generates the same quantity of data as

an 8-bit sampling rate.

16-bit A standard of sound

specification that produces a rich,

detailed sound embodying more than

65,000 possible digital configurations.

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