Creating & editing MP3s

[novus]

I am wanting to create MP3s for download from my site (maintained by
FP2003). Can anyone recommend some editing software that wiil enable me to:
a) Combine live input (spoken word) and pre-recorded sound (e.g sound
effects)
b) Where I can easily re-edit segments of the total file. EG - change a
sponsor's message
c) Profides no more than moderate cost entry but allows an upgrade path

Thank you
novus

 

[sheetrum]

Try using "Audacity"
http://audacity.sourceforge.net/