Reply to How to make an Acapella/Instrumental-version tutorial series!

I just started this new tutorial series with the first part which explains the phase-cancellation-method. This may be an old hat for most of you, but I have to start somewhere.
If you see any mistakes, please help me correct them (especially on theory of sounds).

So here it is:

Part 1 - The phase-cancellation-method

English:
http://en.www.ali.dj/how-to-make-an-...lation-method/

German:
http://www.ali.dj/how-to-make-an-aca...lation-method/