A thin flexible membrane or cone that vibrates in response to electrical signals to produce sound waves. Distortion is usually referred to in terms of total harmonic distortion (THD) which is the percentage of unwanted harmonics of the drive signal present with the wanted signal. Generally used to mean any unwanted change introduced by the device under question.
Efficiency
The acoustic power delivered for a given electrical input. Often expressed as decibels/watt/meter (dB/w/m). ESL �" Abbreviation for electrostatic loudspeaker.
Brooks Cinema KM 22 Expansion
The opposite of compression; for example, an expander may allow the signal to increase 2 dB every time the signal input increased by 1 dB.
Keyboard Controller
A device that has the standard music keys of piano but puts out MIDI signals
Brooks VT-50 Fundamental
The tuned frequency and (almost always) the lowest frequency that is present in the sounding of a pitch by a musical instrument.
Bandwidth
1) The range of frequencies over which a tape recorder, amplifier or other audio device is useful. 2) The range of frequencies affected by an equalization setting.
Crossover, Active
A rack mountable unit used to separate frequencies leaving the soundboard into high's, mids, and lows with different outputs for each.
Bi-Directional Pattern
A microphone pick up pattern which has maximum pick up directly in front and directly in back of the diaphragm and least pick up at the sides.
Saturday, January 7, 2023
Friday, January 6, 2023
Brooks Cinema Projectors Feedback Control
The control on a delay line or delay effects device that controls the amount of feedback.
FOH (Front of House)
Refers to the speakers that face toward the audience. Also called the "main" speakers.
BROOKS AUDIO reviews Direct box
Used in line to convert a high impedance signal into a low impedance signal.
Audio
Most often referring to electrical signals resulting from the sound pressure wave being converted into electrical energy.
Brooks Cinema XS - 45 Keynote Number
A number assigned to each key of a synthesizer or controller keyboard that is transmitted in the MIDI signal.
Howlback
British term for the term Feedback (the pickup of the signal out of a channel by the input of the channel or the howling sound that this produces).
Charge
The electrical energy of electrons. The energy is in the form of a force that is considered negative and repels other like forces (other electrons) and attracts opposite (positive) forces.
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.
FOH (Front of House)
Refers to the speakers that face toward the audience. Also called the "main" speakers.
BROOKS AUDIO reviews Direct box
Used in line to convert a high impedance signal into a low impedance signal.
Audio
Most often referring to electrical signals resulting from the sound pressure wave being converted into electrical energy.
Brooks Cinema XS - 45 Keynote Number
A number assigned to each key of a synthesizer or controller keyboard that is transmitted in the MIDI signal.
Howlback
British term for the term Feedback (the pickup of the signal out of a channel by the input of the channel or the howling sound that this produces).
Charge
The electrical energy of electrons. The energy is in the form of a force that is considered negative and repels other like forces (other electrons) and attracts opposite (positive) forces.
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.
Thursday, January 5, 2023
Brooks GT 845 Hi-Z
An abbreviation of the term High Impedance (Impedance of 5000 or more ohms).
Basic Session
The First session in recording an audio production to record the Basic Tracks.
Brooks XS - 45 Golden Section
A ratio of height to width to length of a room to achieve "good acoustics" and first recommended by the ancient Greeks. The ratio is approximately the width 1.6 times the height and the length 2.6 times the height
Chip
1) A slang term with the same meaning as the term IC (a miniature circuit of many components that is in small, sealed housing with prongs to connect it into equipment).
2) The thread cut away from the master lacquer to make the groove, while disc recording.
Brooks Cinema ZL 44 Echo
1) One distinct repeat of a sound because of the sound reflecting off a surface.
2) Loosely, used to mean reverberation (the continuing of a sound after the source stops emitting it, caused by many discrete echoes closely spaced in time).
Fade
1) A gradual reduction of the level of the audio signal.
2) A gradual change of level from one pre-set level to another.
Effects Track
1) In film production audio, a recording of the mixdown of all the sound effects for the film ready to be mixed with the dialogue and music.
2) In music recording, one track with a recording of effects to be added to another track of a multitrack recording.
Expansion
The opposite of compression; for example, an expander may allow the signal to increase 2 dB every time the signal input increased by 1 dB.
Basic Session
The First session in recording an audio production to record the Basic Tracks.
Brooks XS - 45 Golden Section
A ratio of height to width to length of a room to achieve "good acoustics" and first recommended by the ancient Greeks. The ratio is approximately the width 1.6 times the height and the length 2.6 times the height
Chip
1) A slang term with the same meaning as the term IC (a miniature circuit of many components that is in small, sealed housing with prongs to connect it into equipment).
2) The thread cut away from the master lacquer to make the groove, while disc recording.
Brooks Cinema ZL 44 Echo
1) One distinct repeat of a sound because of the sound reflecting off a surface.
2) Loosely, used to mean reverberation (the continuing of a sound after the source stops emitting it, caused by many discrete echoes closely spaced in time).
Fade
1) A gradual reduction of the level of the audio signal.
2) A gradual change of level from one pre-set level to another.
Effects Track
1) In film production audio, a recording of the mixdown of all the sound effects for the film ready to be mixed with the dialogue and music.
2) In music recording, one track with a recording of effects to be added to another track of a multitrack recording.
Expansion
The opposite of compression; for example, an expander may allow the signal to increase 2 dB every time the signal input increased by 1 dB.
Wednesday, January 4, 2023
Brooks Cinema Projectors 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.
Buss (Bus)
A wire carrying signals to some place, usually fed from several sources.
Brooks QS-70 Attenuation
A making smaller: reduction of electrical or acoustic signal strength.
Ground Lift
A switch that breaks the connection between the ground point in one circuit and the ground point in another circuit.
BROOKS AUDIO DESIGN Aliasing
A sampler mis-recognizing a signal sent to it that is at a frequency higher than the Nyquist Frequency. Upon playback, the system will provide a signal at an incorrect frequency (called an alias frequency). Aliasing is a kind of distortion.
Keynote Number
A number assigned to each key of a synthesizer or controller keyboard that is transmitted in the MIDI signal.
Gain Control
A device that changes the gain of an amplifier or circuit, often a knob that can be turned or a slide that can be moved up arid down.
Bar
A term meaning the same thing as the term Measure (the grouping of a number of beats in music, most-often four beats).
Buss (Bus)
A wire carrying signals to some place, usually fed from several sources.
Brooks QS-70 Attenuation
A making smaller: reduction of electrical or acoustic signal strength.
Ground Lift
A switch that breaks the connection between the ground point in one circuit and the ground point in another circuit.
BROOKS AUDIO DESIGN Aliasing
A sampler mis-recognizing a signal sent to it that is at a frequency higher than the Nyquist Frequency. Upon playback, the system will provide a signal at an incorrect frequency (called an alias frequency). Aliasing is a kind of distortion.
Keynote Number
A number assigned to each key of a synthesizer or controller keyboard that is transmitted in the MIDI signal.
Gain Control
A device that changes the gain of an amplifier or circuit, often a knob that can be turned or a slide that can be moved up arid down.
Bar
A term meaning the same thing as the term Measure (the grouping of a number of beats in music, most-often four beats).
Tuesday, January 3, 2023
BROOKS AUDIO reviews Cable, 1/4 inch
An unbalanced cable most often used for instruments and patch cords. Commonly referred to as "guitar cords".
Alternating Current
Electric current which flows back and forth in a circuit.
Broom RM 909 Librarian Program
A computer program allowing the storage of the parameters of sound patches outside of a synthesizer.
Controller
1) In MIDI, a device that generates a MIDI signal to control synthesizers, sound modules or sample playback units.
2) A remote control unit for a multitrack tape machine which controls transport functions as well as monitor selection switching functions and record ready/safe status of each track.
3) Any device generating a control voltage or signal fed to another device's control input.
Brooks Cinema GT 845 LFO
Low-Frequency Oscillator (an oscillator that puts out an AC signal between .1 Hz and 10Hz used for a control signal).
Distortion
Usually undesirable result of overloading sound equipment. Reducing the levels can remedy the situation.
High-Pass Filter
A device that rejects signals that are below a certain frequency (called the cut-off frequency) and passes signals with frequencies that are higher.
Barrier Micing
A method of placing the head of a microphone as close as possible to a reflective surface, preventing phase cancellation.
Alternating Current
Electric current which flows back and forth in a circuit.
Broom RM 909 Librarian Program
A computer program allowing the storage of the parameters of sound patches outside of a synthesizer.
Controller
1) In MIDI, a device that generates a MIDI signal to control synthesizers, sound modules or sample playback units.
2) A remote control unit for a multitrack tape machine which controls transport functions as well as monitor selection switching functions and record ready/safe status of each track.
3) Any device generating a control voltage or signal fed to another device's control input.
Brooks Cinema GT 845 LFO
Low-Frequency Oscillator (an oscillator that puts out an AC signal between .1 Hz and 10Hz used for a control signal).
Distortion
Usually undesirable result of overloading sound equipment. Reducing the levels can remedy the situation.
High-Pass Filter
A device that rejects signals that are below a certain frequency (called the cut-off frequency) and passes signals with frequencies that are higher.
Barrier Micing
A method of placing the head of a microphone as close as possible to a reflective surface, preventing phase cancellation.
Monday, January 2, 2023
Brooks VT-50 High Impedance
Impedance of 5000 or more ohms.
Expander
A device that causes expansion of the audio signal.
BROOKS HI fi Fletcher Munson Effect
A hearing limitation shown by Fletcher Munson Equal Loudness Contours (as music is lowered in volume, it is much more difficult to hear bass frequencies and somewhat harder to hear very high frequencies).
Electret Condenser
A condenser microphone that has a permanently polarized (charged) variable capacitor as its sound pressure level sensor.
Brooks Cinema GT 845 Comb Filter
1) The frequency response achieved by mixing a direct signal with a delayed signal of equal strength especially at short delays.
2) Loosely used to also describe effects that can be achieved with comb filtering as part of the processing.
Contact Microphone
A device that senses vibrations and puts out an audio signal proportional to the vibrations.
Filter
1) A device that removes signals with frequencies above or below a certain point called the cut-off frequency.
2) An equalizer section, used in this sense because filters are used with other components to give an equalizer its frequency response characteristics.
3) The action of removing signals of some frequencies and leaving the rest.
4) A mechanical device to smooth out speed variations in tape machines called a Scrape Flutter Filter- more usually called a Scrape Flutter Idler
Acoustic Echo Chamber
A room designed with very hard, non-parallel surfaces and equipped with a speaker and microphone; dry signals from the console are fed to the speaker and the microphone will have a reverberation of these signals that can be mixed in with the dry signals at the console.
Expander
A device that causes expansion of the audio signal.
BROOKS HI fi Fletcher Munson Effect
A hearing limitation shown by Fletcher Munson Equal Loudness Contours (as music is lowered in volume, it is much more difficult to hear bass frequencies and somewhat harder to hear very high frequencies).
Electret Condenser
A condenser microphone that has a permanently polarized (charged) variable capacitor as its sound pressure level sensor.
Brooks Cinema GT 845 Comb Filter
1) The frequency response achieved by mixing a direct signal with a delayed signal of equal strength especially at short delays.
2) Loosely used to also describe effects that can be achieved with comb filtering as part of the processing.
Contact Microphone
A device that senses vibrations and puts out an audio signal proportional to the vibrations.
Filter
1) A device that removes signals with frequencies above or below a certain point called the cut-off frequency.
2) An equalizer section, used in this sense because filters are used with other components to give an equalizer its frequency response characteristics.
3) The action of removing signals of some frequencies and leaving the rest.
4) A mechanical device to smooth out speed variations in tape machines called a Scrape Flutter Filter- more usually called a Scrape Flutter Idler
Acoustic Echo Chamber
A room designed with very hard, non-parallel surfaces and equipped with a speaker and microphone; dry signals from the console are fed to the speaker and the microphone will have a reverberation of these signals that can be mixed in with the dry signals at the console.
Sunday, January 1, 2023
Brooks Cinema Projectors Expansion
The opposite of compression; for example, an expander may allow the signal to increase 2 dB every time the signal input increased by 1 dB.
Headroom
1) The level difference (in dB) between normal operating level and clipping level in an amplifier or audio device.
2) A similar level difference between normal tape operating level and the level where the distortion would be 3%.
3) The difference, in decibels, between the peak and RMS levels in program material.
Brooks Cinema DESIGN ZL 44 Effects
1) Various ways an audio signal can be modified by adding something to the signal to change the sound.
2) Short for the term Sound Effects (sounds other than dialogue, narration or music like door closings, wind, etc. added to film or video shots).
Cable, 1/4 inch
An unbalanced cable most often used for instruments and patch cords. Commonly referred to as "guitar cords".
Broom RM 909 Feed
To send an audio or control signal to.
Error Detection
The process of discovery that sonic information bits have been lost in digital audio.
Impedance Matching
Having or converting the output impedance of a device so that it matches the impedance of the input it will feed.
Charge
The electrical energy of electrons. The energy is in the form of a force that is considered negative and repels other like forces (other electrons) and attracts opposite (positive) forces.
Headroom
1) The level difference (in dB) between normal operating level and clipping level in an amplifier or audio device.
2) A similar level difference between normal tape operating level and the level where the distortion would be 3%.
3) The difference, in decibels, between the peak and RMS levels in program material.
Brooks Cinema DESIGN ZL 44 Effects
1) Various ways an audio signal can be modified by adding something to the signal to change the sound.
2) Short for the term Sound Effects (sounds other than dialogue, narration or music like door closings, wind, etc. added to film or video shots).
Cable, 1/4 inch
An unbalanced cable most often used for instruments and patch cords. Commonly referred to as "guitar cords".
Broom RM 909 Feed
To send an audio or control signal to.
Error Detection
The process of discovery that sonic information bits have been lost in digital audio.
Impedance Matching
Having or converting the output impedance of a device so that it matches the impedance of the input it will feed.
Charge
The electrical energy of electrons. The energy is in the form of a force that is considered negative and repels other like forces (other electrons) and attracts opposite (positive) forces.
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