The read
The Jackson everyone quotes is at full volume. The Jackson who showed up to talk about Shaft measures the opposite: an average pitch beneath the optimal band’s floor — genuinely deep, at rest — with chest resonance optimal underneath it and every pause the textbook half-second. Volume variation reads optimal too, which is the detail that explains the movies: the shout lands because the baseline isn’t shouting. What the measurements describe is a quiet, deep, patient instrument with contrast held in reserve — intensity as a choice, not a setting.