Hi,
I have read your requirements, i have already build similar app for my music library
with my proposed app, user can record his voice to mp3, then edit his recording and save a final mp3
about me:
i have a rich portfolio with more than 100+ completed web and desktop apps and 25 years experience in
development small to large scale apps.
with more than 200 satisfied clients i can ensure you the quality results
-attached you will find contact info and sample portfolio