Spencer St Clair

I know essentially nothing about this kind of software, which is why I am asking which software I will need. Here is what I want to do: Put together One-Hour radio programs featuring both spoken word and music. The spoken word will be from CD, cassette tapes and also from a live mike. The music will all be from CDs. I will need to edit which pieces of the spoken word get used, so will need to edit specific clips. Music may start softly near the end of a spoken word excerpt and then the volume increased as the spoken word ends. Some of the spoken word excerpts on cassette are not the best sound quality. Can either of these technologies help clean up these old cassettes? Also, can the cassettes be imputed to the computer and then converted to digital so they can be recorded onto CD? thank you for your imput Spencer in Olympia, WA