I followed the link someone posted somewhere on this forum to a hearing loss simulator (from Univ. of Wisconsin Whitewater, which is not far from me, actually). They had a link to a different site with a CI simulator, and it has several samples of speech through different CI channels and a sample of music and how that sounds through a CI, CI with FM, and the original music. That link is Simulations
You may want to play that for your leader. (The original music by the way is the opening of the Nutcracker, a song that is used in lots of ads and played a lot around the holidays so it is a piece that he will recognize.) The first sample I could GUESS by the rhythm what the piece was but could not discern ANY melody or pitch, just the beats, like if you tried to tap out a song all on one note. The second I could hear melody but still not really identify what instruments there were playing, or any of the tones, but the general up and down of pitch was there.
I had no idea CI's worked like that, actually. I got the general concept, and know it isn't like "normal" hearing, and it isn't a "cure" but didn't realize how limited the information they convey is, especially for things other speech in an otherwise quiet environment. It was kind of cool.