Asus Xonar DSX User Manual page 39

The following message appears when Mic Echo is selected:
The pop-up window allows you to select a recording source. With Mic,
you will only record audio source from microphone with echo effects;
but you are able to record all audio sources from Wave, Aux, and Mic
with microphone echo effect. Click OK to accept or Cancel if you want
to enable the setting later. Tick the Don't remind me again box to
prevent the message from being displayed again.
33
ASUS Xonar DSX