IC to Isolation Booth/Room

 

IC
Abbreviation of Integrated Circuit (A miniature circuit of many components that is in small, sealed housing with prongs to connect it into equipment).

Icon
A visual picture or symbol on a computer screen that represents a file, program or disc that can be used.

ID
An index signal (digital data that gives the machine information of where selections start, their selection number, etc.) on a DAT or CD.

IM Distortion
An abbreviation of the term Intermodulation Distortion (Distortion caused by one signal beating with another signal and producing frequencies that are both the sum and the difference of the original frequencies present).

Images
The squaring of the waveform that happens in the conversion of digital audio bits into analog signals.

Imaging
To make a representation or imitation of the original sonic event.

Impedance
1) A term for the electrical resistance found in a/c circuits. Affects the ability of a cable to transmit low level (e.g. sound) signals over a long distance. Measured in Ohms. Speakers are rated according to power handling capabilities (Watts, W) and impedance (Ohms).
2) The total opposition offered by an electric circuit to the flow of an alternating current of a single frequency. It is a combination of resistance and reactance and is measured in ohms. Remember that a speaker’s impedance changes with frequency, it is not a constant value.
3) The opposition to alternating current.

Impedance Matching
Having or converting the output impedance of a device so that it matches the impedance of the input it will feed.

Inductance
The property of an electric circuit by which a varying current in it produces a varying magnetic field that introduces voltages in the same circuit or in a nearby circuit. It is measured in henrys.

Inductor
A device designed primarily to introduce inductance into an electric circuit. Sometimes called a choke or coil.

In
Short For “in the circuit,” in other words “active.”

In-Line Console
A console with modules that have controls for all console sections in one long strip.

In Port
A jack on a MIDI device or computer that will accept an incoming data signal.

Infinite Baffle
A baffle so large that the sounds coming from one side do not reach the other side.

Infinite Repeat
A function on some delay lines that establish enough feedback so that the repeat echo will last forever, but not so much as to cause a howling sound.

Information Bits
The bits in the digital signal that make up actual values or commands being communicated as opposed to bits that are used for checking & correcting data or other purposes.

Initialize
To prepare a digital storage medium (like a floppy disk) so that it will accept and store digital information bits.

Input
1) The jack or physical location of where a device receives a signal.
2) The signal being received by a device.
3) The action of receiving a signal by a device.

Input Impedance
The opposition to current flow by the first circuits of a device.

Input Monitor
A switch position and operational mode of the electronics of a tape machine where the signal at output of the electronics will be the same as the signal coming into the electronics. In this mode, the tape machine’s meter will read the input signal.

Input/Output Module
A set of controls, on one housing, for an in-line console that has two channels (one for recording and one for monitoring) and has controls for all console sections.

Input Overload
Sending too high of a signal level into a device so that the first amplifier of the device overloads.

Insert
1) A punch in of the all of the tracks being recorded in a recording session.
2) On Solid State Logic consoles, placing an outboard piece of gear in the channel by patching and activating a switch.

Instrument Amplifier
A device that has a power amplifier and speaker in a case (or in separate cases) to reproduce the signal put out by an electric instrument (such as an electric guitar) and to allow the instrument to be heard.

Instrument Out Direct
Feeding the output of an electric instrument (like an electric guitar) to the recording console or tape recorder without using a microphone.

Insulator
A substance such as glass, air, plastic, etc., that will (for all practical purposes) not conduct electricity.

Integrated Circuit (IC)
A miniature circuit of many components in a small, sealed housing with prongs to connect it into equipment.

Interface
Any device that allows one unit to work, drive or communicate with another unit when they cannot do so by just feeding each other often because the units are manufactured by different companies.

Intermodulation Distortion
Distortion caused by one signal beating with another signal and producing frequencies that are both the sum and the difference of the original frequencies.

Inverse Square Law
Simply stated, the fact that in an un-obstructed area (like an open field) the sound pressure level will drop to half-pressure (-6 dB) every time the distance to the sound source is doubled.

I/O
Short for “Input/Output’ and referring to:
1) An in-line console module that contains controls for the input section, output section and monitor section.
2) A module in electronic gear containing input and output amplifiers for the device.
3) A digital port (connector) able to both receive digital data and output digital data.

Isolation
A containing of the sound wave in a certain area so that it will not leak into other areas and/or unintended mics.

Isolation Booth/ Isolation Room
A room that prevents loud sounds from other instruments from leaking in: an isolation booth is usually a smaller room that could be used for only one musician.