| What is delay, relating to echo? |
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| The time intervals between echoes. |
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| What does modulation mean? |
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| What is an amplitude modulation called? |
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| What is a frequency modulation called? |
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| Explain the doppler effect. |
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| As a moving sound source travels towards a stationary listen, the pitch and amplitude increase. As a moving sound source travels away from a stationary listen, the pitch and amplitude decrease. |
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| What is the Leslie speaker? |
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| A speaker that uses the doppler effect by rotating the speaker within the cabinet. |
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| A variable time shift (8-12 ms)
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| Slight time and pitch shift to emulate a chorus group or humanizing element (14-? ms) |
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| What is feedback, in relation to echo? |
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| It sends the produced echo back into the input which creates echo regenerations. |
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| What is depth, in relation to echo? |
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| Added LONGER time range to variate delays. (Delay at 200. Depth: 200-250. Wider swing = longer delay time. It creates two delay times) |
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| What is rate, in relation to echo? |
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| How quickly delay goes between depth. |
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| What modulations mainly make up chorus, flanger, phaser, etc.? |
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| How does convolution reverb work? |
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| It samples and emulates the acoustics within a room. |
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| List the echo timeline in chronological order. |
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| Telephone lines > Tape > Oil Cans > Echoplex > Bucket Brigade (Analog) > Digital |
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| Who created spring reverb? What was it first used in? |
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Laurens Hammond created spring reverb.
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It was first used in an organ. |
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| List reverb timeline in chronological order. |
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| Acoustic Echo Chamber > Spring Reverb > Plate/Foil > Digital |
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| Why did recordings from 20s – 50s sound dry? |
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| Jukeboxes couldn’t play reverb so recordings normally didn’t have reverb. |
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| What is an acoustic echo chamber? |
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| A highly reflective room with a speaker at one end and a mic at the other. |
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| What was the first plate reverb and when was it made? |
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| What was the first digital reverb and when was it made? |
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| What was the first sign of delay? |
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| Telephone wires. Signal would be sent for miles to another city then back to the radio station, causing a delay. |
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| When did the use of tape machines arise? |
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| Who is Ray Butts? What did he do? |
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| Ray Butts created the Maestro Echoplex which allowed for delay in live sound and added more playback heads for more control. |
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| Who created the BBD? When? |
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| K. Teer and F. Sangster created the Bucket-Brigade Device (analog delay) in 1969. |
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