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45 Cards in this Set
- Front
- Back
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Analog
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The same as or like the original
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How many ohms is an XLR cable?
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60
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How many ohms is a sp/dif cable?
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75
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How many ohms is a guitar cable?
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10,000
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How many ohms is an RCA cable?
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50-5000
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What is the frequency of America's electricty?
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60 Hz
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What are 4 jobs of a DI box?
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Lifts ground, Changes from balanced to imbalanced, Changes Imbalanced to balanced, pads the signal, steps up or down voltage
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What types of connector is an AES/EBU cable?
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XLR
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What type of connector is a sp/dif cable?
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RCA
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Unity gain
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When signals are neither boost nor cut.
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What are the 4 signal processors?
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(STAN)
Signal processors Time processors Amplitude Processors Noise Processors |
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What does a signal processor do?
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Modifies a signal.
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What does a Spectrum Processor do?
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Modifies a signal, based on the audio spectrum (by frequencies).
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EQ
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Amplifyers that boost or Cut a frequency or groups of frequencies
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Filter
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Cuts a frequency or group of frequencies.
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High pass filter
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A filter that cuts all frequencies below the cut off frequency.
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Low pass filter
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A filter that cuts all frequencies above the cut off frequency.`
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Cut off frequency
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The frequency that is selected on a high, low, or band pass filter.
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Band pass filter
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Cuts all frequencies above a cut off frequency, and all frequencies below another cut off frequency.
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Frequency Response Curve
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A graph that tells what frequencies a device hears, and how loud (in dBs) it is reproduced.
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Peak/dip EQ
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Boosts or cuts the center frequency, and a pre-determined bandwidth around the center frequency, but not as much as the center.
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Center frequency
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The selected frequency on a Peak/Dip EQ
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Bandwidth
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The range of frequencies around the center frequency on a Peak/Dip EQ
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Shelving EQ
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High or low frequencies get boosted or cut above or below the turnover frequency.
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Turnover frequency
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The frequency selected on a shelving EQ.
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Time signal processors
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A signal processor that modifies the time relationship of a signal.
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Echo
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A noticeable repeat of direct sound
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Delay
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Time intervals between echos
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Depth
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How far it modulates between multiple echo lengths.
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Vibrato
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Pitch modulation
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Tremelo
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Amplitude modulation
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Amplitude signal processors
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Processors modifying the volume, or dynamics of a signal.
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Vu meter
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The average signal level
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0 VU =
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+4 volts (for professional audio)
-12 volts (for consumer audio) |
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Headroom
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Range between 0 VU and overload
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Distortion
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Something in the reproduced signal, that isn't in the original.
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Overload Distortion / Clipping
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When to much signal enters a system.
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Harmonic Distortion
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Distortion only in the upper harmonics of a signal.
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Crossover Distortion
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Distortion at the amplifier on a crossover of a speaker.
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Passive speakers
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Speakers powered by an outside source.
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Active speakers
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Speakers powered by an internal power amplifyer.
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Active bi-amped speaker (active crossover)
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Speakers powered by an amp on each cone, rather than on each crossover.
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Liniairity
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Input=output
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50 ms
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The minimum time it takes a human brain to percieve echos.
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Temperol fusion
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The time before 50 ms, where humans can't percieve echos.
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