EhoCW and CQ100
How to use EhoCW as a CQ100 keyer
by Douglas, VE3EFC
It is easy to set Windows Recording (capture) mixer to use Stereo Mix (What You Hear).
Sometimes Windows Vista will hide this setting.
The user can place microphone near his speakers as a crude method.
Analog audio can be routed from the speaker-out to the line-in using a cable.
Virtual Audio Cable software is another method.
There are many methods.