Expressions of disapproval are on a level of vulgarity that cannot be tolerated. The way to express disapproval is to do without applause.
Rudolf BingI never socialized with singers. It's very dangerous if you work with opera... I don't think that in 30 years a singer has entered my apartment.
Rudolf BingThere are two sighs of relief every night in the life of an opera manager. The first comes when the curtain goes up The second sigh of relief comes when the final curtain goes down without any disaster, and one realizes, gratefully, that the miracle has happened again.
Rudolf Bing