I last read Sense and Sensibility 9 years ago and had forgotten how funny Austen was. Here are zingers for both Sir John and Lady Middleton at the end of chapter 7:

Sir John was loud in his admiration at the end of every song, and as loud in his conversation with the others while every song lasted. Lady Middleton frequently called him to order, wondered how any one's attention could be diverted from music for a moment, and asked Marianne to sing a particular song which Marianne had just finished. Colonel Brandon alone, of all the party, heard her without being in raptures. He paid her only the compliment of attention; and she felt a respect for him on the occasion, which the others had reasonably forfeited by their shameless want of taste.