This is similar to two ranks of organ pipes which are identical except one is
tuned slightly sharp to the other, called a celeste rank, to create beats.
Merry
In a message dated 11/18/2002 9:50:47 AM Eastern Standard Time,
johnlink@n... writes:
> Dean FH Macy wrote:
>
> > The sound of a chorus is unique because most
> > people in a chorus do not have perfect pitch. If they did, the
> > resulting sound would be dull/flat sounding. The members in a chorus
> > sing on pitch and somewhere between the lower edge and upper edge of
> > pitch. This sound, the 'detuned' chorus, sets up harmonies, call it a
> > natural vibrato, which yields a rich, full sound.
>
> This important phenomenon is not "vibrato", but rather the "chorus
> effect". It is the same phenomenon that allows us to
> distinguish the
> sound of one violin from that of a violin section.
>
> John Link
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