Most legitimate English Plus 2 audio files come in MP3 format (usually 128kbps or 192kbps). They are organized by unit (Unit 1 to Unit 8) and by activity type (e.g., EP2_U1_Ex3.mp3 ).
Depending on your edition (e.g., 1st or 2nd edition), you can find the audio: english plus 2 audio files