Narration, sound effects, and music often originate as studio-recorded analog data, although they can also be recorded digitally. No matter how it originates, all sound data destined for multimedia applications must eventually be digitally sampled and stored in the Microsoft waveform format for playback.
You find that no one method of acquiring audio will meet all your needs. Experiment with different approaches and tactics until you find the best mix for your situation. The following three alternatives are worth exploring:
Developing your own sound recordings
Purchasing production music libraries
Hiring a digital sound studio to produce digital recordings