These are the audio files for Up Where We Belong. Download the file for your part, plus the file that is just called Up Where We Belong, which has all parts.
An MP3 player should recognise the files as being part of an album called MCC July 2013.
Note that the many bars at the beginning of the score are not in these files (for brevity). This means you are straight into the chorus, and when the first repeat bar is finished (bar 28 in your score), the music immediately starts with the second chorus.
In terms of instruments used, the file with all parts has all voice parts using a voice synth, there is no piano. In the individual parts, all the other singing parts are use the voice synth, your part is played as a piano.