The genial former goalkeeper has, however, seen other coaches receive instructions during games.
"They don't let their impairment affect them," said Mr. Germano, though he sometimes had to repeat instructions during rehearsals.
He remembers sending on instructions during an international, only to receive the following message back: "Thanks coach, but we think we've got it covered".
At Duke games, after he gives his instructions during a timeout — the classic command-and-control moment — his players break away from him and form their own huddle.
The receiver, whose loudspeaker is a flesh-colored hearing aid, weighs about a pound and enables the wearer to receive an uninterrupted flow of instructions during the play.
Manchester City striker Tevez is currently serving a two-week suspension for disobeying manager Roberto Mancini's instructions during Tuesday night's Champions League game at Bayern Munich.
Those concerns became mired in a long-running battle over the U.C.I.'s plans to ban teams from using radios to give riders instructions during races.
In April, a federal appeals court ordered a new sentencing hearing for Mr. Abu-Jamal because jurors had received potentially misleading instructions during his 1982 trial.
And they were up for it, even as Lambert purred instructions during the songs ("I want Fats Waller barrelhouse piano here, David, use your shoulders; Raphael, I want some really filthy, filthy tenor saxophone").
This from a man so in charge that he installed a special phone in every control room, the "Roone Phone," so he could call in his instructions during broadcasts.
But the complexity of interacting with the cube and also of adhering to the app's spoken instructions during the cube game, and the app's other games, means younger children will almost surely need supervision when using this app.
