A method for keying human voice audio frequency includes the steps of
setting the human factor of the singer; recording the singing of the
singer; calculating the audio frequency by an audio frequency counter;
recording the maximum ground frequency by the recorder; estimating a
maximum fundamental audio frequency thereof by the diapason estimator;
and converting the maximum fundamental audio frequency into musical
terminology, the best audio frequency of the singer being determined. The
method for keying human voice audio frequency is very easy and fast.
