This drill is rooted in the standard range of the trumpet. The pedal tones keep you loose and engage your ear. The exercise promotes flexibility and accuracy. Players should feel limber after playing it.
Scales in thirds are common enough, but scales in fifths or sevenths are rare. The intervals remain within the octave because compound intervals turn this drill into a workout as opposed to a stretch.
Slur it, tongue it, subdivided it.(pdf)
