Hi All,

My page concerning the DSP generation of pink noise (1/f noise) 

  http://www.firstpr.com.au/dsp/pink-noise/

has been updated to include:

1 - Paul Kellet's "instrumentation grade" pinking filter for white 
    noise, which produces pink noise +/- 0.05dB above 9.2Hz 
    (44100Hz sampling rate).

2 - His simpler "economy" grade pinking filter which is accurate
    to +/-0.5dB.

3 - Allan Herrimen's graphical analyis of the responsed of these two
    and of Robert Bristow-Johnson's three pole and three zero filter.

4 - Allan's refinement to his analysis of the Voss-McCartney 
    algorithm of adding multiple white noise sources at lower and 
    lower octaves.

The contributors to this project are on the Music DSP mailing list,
details of which are at my page.

 - Robin


===============================================================

Robin Whittle    rw@firstpr.com.au  http://www.firstpr.com.au
                 Heidelberg Heights, Melbourne, Australia 

First Principles Research and expression: Consulting and 
                 technical writing. Music. Internet music 
                 marketing. Telecommunications. Consumer 
                 advocacy in telecommunications, especially 
                 privacy. M-F relationships. Kinetic sculpture.
                  
Real World       Electronics and software for music including:
Interfaces       Devil Fish mods for the TB-303, Akai sampler 
                 memory and Csound synthesis software.