SOYO SY-P4X400 DRAGON Ultra User Manual page 166

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.
Please left-click "Echo" to activate the function. For pitch
adjustment, please use ↑ and ↓ keys on the keyboard. For
microphone pitch adjustment, please use "+" and "-" keys on the
numeric keyboard. To resume the original, please use← and →
keys.
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