@steve when you mentioned the sound engineer - have you done music or audio production?
I haven't but my son has a degree in audiology and I've taken an interest in what he was doing to earn that degree........he's now taken a different path for work and is training to be a Paramedic.
I introduced him to Pink Floyd at an early age and we bought him a guitar from a charity shop when he was 12........he subsequently taught himself to play and read music, and is now an accomplished player.
I've always had a keen interest in music and love it when I can hear good quality production - albums like Dark Side of the Moon and Pet Sounds by the Beach Boys are favourites of mine in part because of the high standard of the sound produced.
Steve