On Mon, 12 Jan 1998, Juhana K Kouhia wrote:
>(i) Moorer's compressor uses fixed set of four bands which are overlapping;
>however, it is not the kind of overlapping seen in the FFT but more
>carefully planned (those four bands are made by combining 16 FFT bands).
>
>(ii) Sound Forge (or Cool Edit?) has a compressor with four bands made
>by simple band-pass filters; it is suggested that the bands doesn't overlap
>this looks like a quick hack with respect to Moorer's system.
The Moorer system probably tries to achieve some specific psycho-acoustical
effect, probably increasing the perceived loudness of the signal without
increasing the dynamics of the signal at the same time. The compressors used
in common sound editors tend to be less specialized and, alas, less well
designed. But of course the usage of these compressors is quite different:
Cool Edit is primarily used for mutilating sound for 'cool' effects,
research compressors are used for more specific needs, such as noise removal
or well planned psycho-acoustical enhancement...
Sampo Syreeni <decoy@iki.fi>, Decoy/Dawn, Student (Math, Helsinki University)
This archive was generated by hypermail 2b29 : Mon Jan 28 2002 - 11:46:31 EST