 whooshing sounds (high index) and hissing or whistling sounds (low index),
useful for Oceanic Music, but more subtle kinds of noise can be hard to reach.
Heinrich Taube had the inspired idea
of feeding the noise (as a sort of cascade FM) into the 
parallel modulators of an fm-flute, but not into the carrier.  The modulating signal becomes a sum of 
two or three narrow band noises (narrow because normally the amplitude of the noise is low), and 
these modulate the carrier.  In CLM:
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