With unforgettable performances by Alec Guinness (who reckoned it one of his best) and John Mills, both playing against type, this film ought to be more widely known and revered today.
Superbly constructed, with an unforgettably painful and poignant climax as Guinness's character faces up to the enormity of what he has done, Tunes of Glory - as its director says in an accompanying interview - transcends its time.
What gives it its power is that the specifics of a particular culture (in a Scottish regiment) are made clear - so you are made to recognise what's at stake with each new development in the growing personality clash and power struggle between Guinness and Mills.
James Kennaway, who wrote the screenplay based on his own novel, knew that world, and Ronald Neame had him on hand to advise. Neame does his job in an unshowy but effective way, so you can focus, as he wished, on the acting, and there's a wonderful accompanying cast, too, with Dennis Price and Gordon Jackson especially notable. The final scene is beyond words.