These are the audio files for Climb Every Mountain. Download the file for your part, plus the file that is just called Climb Every Mountain , which has all parts.
An MP3 player should recognise the files as being part of an album called MCC July 2013.
In terms of instruments used, the soprano/alto is played as a violin and the tenor/bass is played as a bassoon, and there is the accompanying piano part. In the individual parts, all the other singing parts are silent, your part is played and the piano is quiet(ish).