Flutter tonguing is performed with a silent rolling of the “r” (i.e., without vocalization), adding a rhythmic flutter to the sound. Different speeds are possible, changing the perceived height of fluttering independent of other sonic elements (e.g., ordinario pitch). In the case of an aspirated flutter tongue (breath instead of ordinario), the result is similar to the revving of a motorcycle engine.
Pitch range. Depends on the technique being “fluttered.” In the case of ordinario, pitch range is unchanged.
Dynamic range. Same as ordinario for standard flutter tongue; niente to f for aspirated flutter tongue. At higher dynamics, this technique uses up the player’s air very quickly.