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A2 Music Technology – Qu. 4

A2 Music Technology – Qu. 4. WALT – to define what reverb is in order to understand how it is created. Reverb – What is it?. Reverberation is the persistence of sound in a particular space after the original sound is produced.

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A2 Music Technology – Qu. 4

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  1. A2 Music Technology – Qu. 4 WALT – to define what reverb is in order to understand how it is created.

  2. Reverb – What is it? • Reverberation is the persistence of sound in a particular space after the original sound is produced. • A reverberation, or reverb, is created when a sound is produced in an enclosed space causing a large number of echoes to build up and then slowly decay as the sound is absorbed by the walls and air.

  3. Extra info… for extra marks. • It is added to recordings made using close mic techniques. • Reverb levels can therefore be controlled by an engineer or performer. • Reverb is an auxiliary effect. • Reverb can be found in guitar amplifiers, FX pedals, dedicated hardware or added with a software plug-in.

  4. Natural Reverb • Natural reverb is captured using ambient mic techniques. i.e. more reverb is captured if a microphone is further away. • Omnidirectional or figure of 8 microphones pick up reverb better than cardioid mics. • Room acoustics determine the nature of reverb.

  5. Echo Chambers • In the 1950’s reverb was made by playing a dry signal in a room, placing a loudspeaker at one end and an omnidirectional mic at the other. • The height and angle of the microphones affects the amount of reverb. • These rooms had to be built using reflective material like stone or concrete. (Garages or stairwells are popular with home studios!

  6. Plate Reverb • Large metal sheet! Sound input by a speaker-like transducer causing the sheet to vibrate. Reflections from the sheet are picked up by microphone-like transducers. • Reverb time is controlled by a dampening pad used to absorb the reflections more quickly! • Very expensive! • Gives very dense reverb and still used today on vocals.

  7. Spring Reverb • Similar to plate reverb but a spring is used instead of a metal sheet. It is also smaller and has a characteristic twangy sound. Reverb time can be adjusted by the amount of tension in the spring. Spring reverbs tend to have a mid-range boost and long reverb time.

  8. Digital Reverb (finally!) • Appeared in the 1980’s. • A signal is input into a computer algorithm which consists of many delays and echoes which emulate real spaces. • Is easily changed and adjusted. Early reflections are more prominent than in spring/ plate reverb so they sound more realistic. • Digital reverb is very heavy on the CPU. As CPU’s got faster the realism of reverb improved. • In the late 1990’s digital reverbs became software plug-ins in sequencing packages (like cubase).

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