Glossary: Opcode | Sweetwater.com

Expert Center > Glossary > Opcode

«Back to Glossary Menu

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0-9

Opcode: Most people who have been involved in MIDI sequencing for the last decade are familiar with the name Opcode, as the company (acquired by Gibson in 1998) that made Vision, OMS, and Galaxy software as well as the Studio 5 MIDI interface. However, in computer science, an opcode is the portion of a machine language instruction that specifies the operation to be performed, or to put it simply, the opcode tells the computer what to do. The term is an abbreviation of Operation Code. In terms of language, it helps to think of the opcode as the verb, and the operands as nouns. For example, in the expression 5 + x, 5 and x are the operands, and + (addition) is the operator. The operands upon which opcodes operate may, depending on CPU architecture, consist of registers, values in memory, values stored on the stack, I/O ports, the bus, and etc. The operations an opcode may specify can include arithmetic, data copying, logical operations, and program control.

Obeche

Oberheim OB-X

Oblique Room Mode

Occlusion

Octave

Octo Bass

Odd-order Harmonic Distortion

OEM

OFC

OFC

Off-Axis

Off Line

Offset

Ogg Vorbis (.ogg)

Ohm

Ohm's Law

Okoume

OLED

OMF (OMFI)

Omnidirectional

Omni Mode

OMS

On-Axis

Onboard

One-off

One-shot Sample

Online

Op Amp

Opcode

Open

Open-back Cabinet

Open-voice Triad

Open Air

Open Back

Open Chord

Open C Tuning

Open Mic

Open Source

Open String

Open TL

Open Tuning

Open Voicing (or Spread Voicing)

Opera Buffa

Operating System

Operator

Optical

Optical Compressor

Optical Media

Opto-isolator

Orange Book

Oratorio

Orbiter

Orchestra

Orchestrion

Orchestrions

Organ

ORTF

Orville Gibson

OS

OSC

Oscillator

Oscillator Sync

Oscilloscope

Ossicles

Ostinato

OS X

OTB

OTP

Out

Out

Out of Phase

Out Of The Box

Output

Output Jack

Ovangkol

Overdrive

Overdub

Over Easy

Overheads

Overload

Over(s)

Oversampling

Overshoot / Undershoot

Overtone

Overture

Overview

OXFW911

Oxide

Oxygen-free Copper

Our Customers Say...

“My Sales Engineer is the best. If I need it tomorrow, I have it tomorrow. He makes sure everything is in order and that I'm set up right. I've spent a lot of money at other places, too, but I don't remember them calling me to make sure everything's okay.”
Nick Moon, Portland, OR