In an audio reproducing apparatus, first and second filters convolute
impulse responses corresponding to transfer functions from a position
where a right-hand sound source is located to the right and left ears of
the listener into an audio signal, respectively, and third and fourth
filters convolute impulse responses corresponding to transfer functions
from a position where a left-hand sound source is located to the right
and left ears of the listener into another audio signal, respectively.
Fifth and sixth filters extract low-frequency components of the audio
signal, and seventh and eighth filters extract low-frequency components
of the another audio signal. The output signals of the first, third,
fifth, and seventh filters are added, and the output signals of the
second, fourth, the sixth, and eighth filters are added.