What is the note cal

semihemidemisemiquaver? 32 notes to one beat...even at a very slow tempo, that is FAST.

Notes after the 4 line as it were hemi demi semi quavers, just become little grace notes or semi quavers with numbers below them grouping a lot together, the length of the notes basically becomes irrelevant to the bar time after hemi demi semi quavers. For example look at the music for Liszt`s prelude to the transcendal etudes, there is 19 semi quavers tied together in the bar.