Vibrato
Notated with a verbal instruction,
sometimes with a wavy line.
Vibrato on the trombone may be produced either by lip or slide motion. Slide vibrato can be quite exaggerated if required.
Vibrato:
Slide
vibrato effects across the instrument
Glissando
A slide in pitch between notes. Glissandi within notes of the harmonic series are straightforward and characteristic on the trombone. Glissandi outside the series present more problems, and are usually 'faked' by sliding to the nearest available pitch then leaping to the desired note as quickly as possible.
Trombone glissandi
Glissando:
Trills
Trills are executed with the lip, and are more effective higher up the harmonic series, where the distance between notes is smaller.
Trills:
A low,
ineffective trill
A
higher, more effective trill
Tremolo or "Shake"
The same comments apply to shakes as to trills.
A low, awkward shake
A high,
more effective shake