In his classic text, Orchestration, Cecil Forsyth talked about brass instruments being classified into two categories – whole-tube instruments and half-tube instruments.
Whole-Tube Instrument – a brass instrument capable of playing its fundamental pitch (the so-called pedal tone).
Half-Tube Instrument – a brass instrument that cannot play its fundamental pitch.
Forsyth was never clear as to which instruments fell exactly into what category. In general, he stated that tubas were most definitely whole-tube instruments while trumpets and cornets cannot. He neglects to mention trombones in either category, but includes passages that show pedal tones. Continue reading “Whole-Tube and Half-Tube Instruments and the Pedal Range”