A thousand trills and quivering sounds In airy circles o'er us fly, Till, wafted by a gentle breeze, They faint and languish by degrees, And at a distance die. Joseph Addison
As a soprano who sings 'Lucia di Lammermoor,' I have the high notes and the trills. No problems there. But going into the low registers is lots of work. Anna Netrebko
Boogie-Woogie style was characterized by a regular bass figure, an ostinato or riff and shifts of level in the left hand, elaborating each chord and trills and decorations in the right hand. Source: Internet
One is the file or comb that has tough ridges; the other is the plectrum is used to produce the vibration. citation For tettigoniids, the fore wings are used to sing. Tettigoniids produce continuous songs known as trills. Source: Internet
In the velar position, the tongue has an extremely restricted ability to carry out the type of motion associated with trills or taps, and the body of the tongue has no freedom to move quickly enough to produce a velar trill or flap. Source: Internet
Side by side, heads bobbing in concert with the delicate trills and shifting dynamics, the Silvermans gave fresh life to old music and set the tone for the technically excellent hour to follow. Source: Internet