If you only do the Converting of MP3 into CP3 at www.vocoo.com with VOCOO CP3 STUDIO, you can not only listen to the original music but also sing to it and create UCC by recording your voice onto the original accompaniment.
With VOCOO CP3 STUDIO-iPhone installed on your iPhone, you can download CP3 and UCC wirelessly from vocoo.com.
And with VOCOO CP3 STUDIO-iPhone, you can enjoy listening and singing to the original music and creating UCC through the vocal volume adjusting function of CP3.
And then you can upload UCC wirelessly onto vocoo.com via CP3 STUDIO-iPhone and then mix it with your own videos via CP3 EDITOR provided by vocoo.com to create UCC to share with others.
iPhone OS 3.x
iPhone OS 2.x
iPhone OS 1.x
iPhone OS 4.x