IMPMOOC Lession 5 Assignment - Reverb
Hi, My name is SHIM, Wooyoung (SHIM is my family name, not the first name), and Iโm from Seoul, Korea.
Iโll explain reverb - comparing algorithmic reverb with convolution reverb for my 5th assignment in IMPMOOC.
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. (from wikipedia:reverb)
In musical terms, a reverb is a kind of delay effect creating a sense of space by adding some delayed sound. We can say a reverb is simulating a real space, and there are mainly two ways of implementing reverb effects: algorithmic and convolution reverb.
Algorithmic reverb creates a reverb from some mathematical formula, like synthesizing sounds from MIDI.
Various algorithmic reverb effecters
There are various formula for reverb effects, and many implementation. Algorithmic reverb depends on user's experiences and senses, because there's no rule or a kind of regulation how to adjust various input factors.
In audio signal processing, convolution reverb is a process used for digitally simulating the reverberation of a physical or virtual space. It is based on the mathematical convolution operation, and uses a pre-recorded audio sample of the impulse response of the space being modeled. (from wikipedia:convolution_reverb)
- from http://d3vvl31cy8gagb.cloudfront.net/135_convolution/recordingSetup.gif
various convolution reverb effecters
- from http://d3vvl31cy8gagb.cloudfront.net/135_convolution/convolutionReverbs.jpg
Convolution reverb is as good as the its audio samples (impulse response). It is very realistic, because it's on the sampled data collected from the real spaces - jazz clubs, opera halls, etc. But it lacks of some kind of freedom.
Therefore, it is better two use both algorithmic and convolution reverb to create what you want, according to musical instruments and tracks within your music.
http://en.wikipedia.org/wiki/Reverberation
http://en.wikipedia.org/wiki/Convolution_reverb
http://en.wikipedia.org/wiki/Convolution
http://audio.tutsplus.com/tutorials/sound-design/how-to-use-convolution-for-reverb-effects/
I'm very sorry for lacking of sound examples or video tutorials.
Anyway, Thanks for reading : - )