The amount of time it take to progress from starting the act of shooting to the release is not specified. That interval of time can most definitely be affected by a foul. In absense of a foul, the shot may or may not have been released in time. Being forced to put up a shot through the foul can (and usually will) cause the shooting motion to take a little longer....particularly if the foul is very early in the shooting motion such as when the player is pivoting prior to releasing the ball on a typical post move.
I'm of the camp that if the foul is committed (and the whistle is blown) before the horn, then the clock was not properly stopped and horn sounded in error and is, as a result, irrelevant.
|