SOYO SY-K7V DRAGON Plus! User Manual page 183

HRTF
HRTF stands for Head Related Transfer Functions, and it is a
set of audio filters varying locations of sound effects(spatial
hearing cues) in three-dimension measured from the listener's
eardrum.
This technology and special digital signal processing are used
to recreate spatial hearing cues, making our ears hear realistic
and three-dimensional sounds coming from a pairs of loud
speakers or headphones.
When you activate this Demo, you can hear a helicopter fly
around you clockwise for three times.
Echo
Like to sing along with Karaoke? It might occur to you to use
your PC for this. However, when you turn on the microphone,
play the song, and ready to sing, you see that the effect is not as
good as expected. Why? Echo is the answer. To help you solve
this problem, this demo is designed to include the Echo function.
Please left-click the upper right of the demo screen as shown
below, and choose your own music file to play. Please note the
file type has to be MP3 file.
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