Modern didgeridoo designs mouthpiece with a concave face that is close to double the diameter of a regular didgeridoo mouthpiece. This mouthpiece gives a player more room to control the vibration of their lips at frequencies below the traditional drone. The technique is similar to playing pedal tones on a brass instrument. The desired tone is different then brass, and there for the embouchure used to play it is different than brass technique. The most prominent playable note on these instruments is always one octave below the fundamental didgeridoo drone. Several other drone-notes can be played below the fundamental as well, and these
Brass instrument characteristics. Trumpets, trombones, and tubas are characteristically fitted with a cupped mouthpiece, while horns are fitted with a conical mouthpiece. One interesting difference between a woodwind instrument and a brass instrument is that woodwind instruments are non-directional. This means that the sound produced propagates in all directions with approximately equal volume. Brass instruments, on the other hand, are highly directional, with most of the sound produced traveling straight outward from the bell. This difference makes it significantly more difficult to record a brass instrument accurately. It also plays a major role in some performance situations, such as in marching bands.