Auxiliary line
As guides is called linear drawing aids .
Descriptive geometry
In representational geometry , they are useful as orientation for constructions or perspective drawings. While these lines are not part of the actual drawing, auxiliary lines help to construct a figure.
Notes in music
In musical notation , they are used to represent tones that lie outside the lines of the notation system . They are used accordingly for particularly high or low tones.
In the piano etudes by Chopin , which the virtuoso "across the pianist Register hunt", there are numerous examples of the excessive use of guides, for example in the final of the Revolutionary Etude .
In order to use as few guidelines as possible, you can in some cases change the clef or add instructions for octaving .
literature
- Don Michael Randel (Ed.): The Harvard Dictionary of Music. 4th edition. Belknap Press of Harvard University Press, Cambridge MA et al. 2003, ISBN 0-674-01163-5 , p. 459.