With the MP3 file secure on John's hard drive, he can then play it with an MP3 player such as SoundJam MP, Audion, or QuickTime.
(the MP3 file; secure; ) (he; can play; it; T:then) (Audion; [is] MP [of]; SoundJam)
the MP3 file he Audion
secure can play [is] MP [of]
it T:then
SoundJam