I am not a beginner of creating videos in Sony Vegas Pro 9.
I would like to be a person who will create own sound effects
that will be used during showing subtitles and intros of my movies.
My videos are captures of my family life.
I would like to create such sounds effects which doesn`t fit
any music instruments. i.e. space flight`s jet, punching etc.
I don`t want these sound to be such realistic. It would be
such sounds which are artifiicial/unreal.

I am looking for a freeware or not freeware software which
let me create such sound effects that I can use on my movies
and then upload to youtube web page and earn on them.
I would like to prevent from youtube problems of copy rights
that`s why I would like to create such effect by myself to have
100% fully rights for them.
I am not a musician so such software should be easy to use,
but not the easiest one. I can learn it up how to use it.

Do you know if Sound Forge Pro 10 will be the one I need it?
http://www.sonycreativesoftware.com/soundforge

Maybe you know some good freeware equivalent for it?

Is Virtual DJ a software which let me achieve such sounds
effects? It is freeware. I don`t know what about music rights
of files creates of Home Basic version of this software.

Please help me
Netm.