The bugle is one of the simplest brass instruments; it is essentially a small horn with no valves. All pitch control is done by varying the player's embouchure, since the bugle has no other mechanism for controlling pitch. Consequently, the bugle is limited to notes within the harmonic series. The bugle is used mainly in the military.
... with so few viewers. Their response was to promote the channel through their ordinary channels BBC1 and BBC2, using terrestrial signals, and this is seen by some as ...