If you haven't seen it, there was a documentary on Herb Alpert produced by BBC4. Someone has uploaded it to YouTube, and it being a BBC product, it may not be there long, so you might want to check it out.
Herb Alpert BBC4 Documentary
Carpenters appearance is in the latter half, but Richard appears throughout.
Herb Alpert BBC4 Documentary
Carpenters appearance is in the latter half, but Richard appears throughout.
