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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

Octave
An octave is a frequency ratio of 2:1. An octave band consists of all of the frequencies within an octave. There is one octave between 100 Hz and 200 Hz, and between 1,000 Hz and 2,000 Hz, for example. Octaves are perceived as equal pitch intervals, even though the true bandwidth in Hertz varies with the frequency level of the octave. To our ears, two frequencies an octave apart (whether it might be 100 to 200 Hz or 1,000 to 2,000 Hz) sound like the same note.

It is interesting that our ears obey a precisely logarithmic law when assigning subjective pitches to frequencies. Even though an octave is strictly speaking a subjective judgment, it is so closely equal to frequency doubling (no matter where one is in frequency) that it has been defined as an objective measure.


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

Ovangkol

Overdrive

Overdub

Over Easy

Overheads

Overload

Over(s)

Oversampling

Overshoot / Undershoot

Overtone

Overture

Overview

OXFW911

Oxide

Oxygen-free Copper

     
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