First, let me apologize for my complete ignorance on the topic, i.e. recoding.
, as well as for posting this question in the wrong thread. I need some help (or a lot!). I need to record just my voice while listening to an audio file, let's say coming from a video. Well for the purpose being, I think I'd rather tell you I'm training to be a conference interpreter, so I download speeches which afterwards I play and interprete just for practice and some critisim. The thing is that I play the original audio and, although I've set MIC in the options Audacity keeps recording my voice along with the original audio. 
If I lower the volume for the original, I can't listen to it obviously! So, pleeeeease, is there anyone who can give me precise instructions in plain English (avoid any technisms) on how to proceed for this particular task?Thansks very much