The techniques involved by musicians to provide air to a wind instruments. The techniques, although similar for all wind instruments, have unique aspects for each instrument. Combined with the techniques of tonguing and embouchure, breathing is a critical aspect of instrumental tone production. Some of the special breathing techniques include staggered breathing and circular breathing.See also staggered breathing and circular breathing.<br><br> In the audio world, this is the audible change in level of a signal due to the use of noise reduction or other dynamics processing.