"They have all a similar function, that of embellishing or decorating a note by a rapid repetition of the note and its adjacent notes.
In practicing these ornaments, you should again avoid the heavy chest-voice and the aim must be to articulate the notes clearly without slowing down their fast pace. Remember that they are decorative groups, not essential melody notes.
Performing these ornaments properly has to be developed by working up the speed gradually from a slow starting pace."
Graham Hewitt: How to Sing
Elm Tree Books Ltd., London / 1978
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