21.   Patrick Pummill, a bass-baritone, works as a sound engineer on Broadway.

22.   So does her sister, who is a college student in Toronto, and her brother, a sound engineer in Paris.

23.   Someone in the cast overheard Blackwell that night, and asked her to audition for the position of sound engineer.

24.   The couple even hired a sound engineer.

25.   The public was told nothing about it at first while sound engineers experimented with adjustments.

26.   The system was devised by Richard Fitzgerald, a veteran sound engineer who created the infrared system that most Broadway houses use to serve the hearing-impaired.

27.   There have been two sniper attacks at the border crossing in recent days, including one last week in which a Chilean sound engineer was hit.

28.   There were no set designers, no sound engineers and credits did not roll at the end of the drink.

29.   These derive from rudimentary archival disks made by the sound engineer Hermann May.

30.   U.S. security agents and White House sound engineers prowled the parliament building, part of which served as the old State Planning Agency during Soviet times.