Le microphone avec d'echo

Bonjour,
Je cherche à avoir d'echo en branchant un microphone dans l'entrée Mic de l'ordinateur. Apparement c'est possible, je vous montre ce que j'ai trouvé dans un site mais je sais pas comment le faire, est ce qu ' un qu 'un qui connait bien en informatique peut me dire comment faire svp avance merci.

Echo or reverb for microphone Input ?

civic5zigen
Hi, how do I make the input from Mirophone to be echo and reverb so it'll mix well with the audio? And only apply the reverb or echo effects to Mic in and not the audios. I need to do this because I am trying to build an Karaoke machine, and currently the sound from Mirophone have no echo or reverb effects and sound very bad.
I try looking into the DSP graph but I have no idea what to do, can someone help?
Or is there an easiler to way to apply fx to min in only?
Also, I need to hook two mic into my computer, so can I convert the Line-in to be same as Mic-In, and have the same echo fx and the boost? How do it do it?
Thanks so much

Max M.
The simplest way is to connect prolog pin 0/1 (this is where mic-in comes from) to "xsumm_r" inputs 0/1 (inl/inr).
Then you can adjust mic reverb send by "Reverb" fader at mixer's "FX" page... yep... something like that.