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OBLIQUE MODE
See MODES
OCTAVE
The interval between two frequencies whose ratio is 21.
OFF-LINE
Process carried out while a signal is not being recorder or played back.
OHM
Unit of measure of electrical resistance.
OHM'S LAW
Describes the relationship between Current, Voltage and Resistance in an electrical circuit. It states that 'Current is directly proportion to Voltage and Inversely proportion to Resistance. [ I = V / R ]
OMNIDIRECTIONAL MICROPHONE
A microphone, which is, equally sensitive to sound waves approaching from all directions.
OPEN CIRCUIT
A point in an electrical circuit with infinite resistance. A colloquial term for indicating a break in the signal path that prevents the signal from flowing.
OPEN REEL TAPE
Tape that is wound on spools as opposed to tape sealed in a cassette.
OPERATING SYSTEM
A software program that allows the user to run programs that are more complex. It interfaces the programs the user is running with the computer's components and peripherals. DOS, Windows 3.1, Windows 95, OS/2, Windows NT, Unix, Linux, are all examples of operating systems.
OPTICAL DISKS
Storage devices that use a light (LASER) to write and read data.
OPTO-ISOLATORS
OSCILLATOR
An electronic circuit designed to generate a periodic electrical waveform.
OSCILLOSCOPE
A device used o display one or more electrical signals.
OSSICLES
The three small bones we find in the middle ear. Called the Hammer, Anvil and Stirrup they form a mechanical coupling system between the eardrum and the cochlea.
OUTBOARD EQUIPMENT
Colloquial term for audio equipment not cased within a mixer or tape recorder.
OUT OF PHASE
Said of two signals when their peak and zero values are not reached at the same time.
OVAL WINDOW
A tiny membrane window in the cochlea to which the footplate of the stirrup ossicle is attached. The sound from the eardrum is transmitted to the fluid of the inner ear through the oval window.
OVERDUBBING
The process of replacing or recording further material on a multitrack recorder while monitoring previously recorded material.
OVERLOAD
The process of exceeding the operating capacity of a device.
OVERSAMPLING
The process of using a sample rate higher than necessary. This is done to allow the anti aliasing filters to have a gentler slope. Over sampling is often used in conjunction with Noise Shaping.
OVERTONES
A component of a complex tone whose frequency is higher than the fundamental. Also known as Harmonics or Partials. |
