[sdiy] converting white noise to pink noise

[Scott Gravenhorst]

http://www.xilinx.com/ipcenter/catalog/logicore/docs/lfsr.pdf

This contains "how it works" information as well as a table of tap values that will
produce LFSR noise generators up to 168 bits long.

-- ScottG

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-- Scott Gravenhorst
-- GateMan-III - FPGA Based Monophonic MIDI Synthesizer with SVF
-- PolyDaWG/8 - FPGA Based 8 Voice Polyphonic MIDI Synthesizer
-- phLUTe - FPGA Based Monophonic Physical Model MIDI Synthesizer
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-- NonFatMan: home1.gte.net/res0658s/electronics/
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