I was a little surprised that this question wasn't already asked here - perhaps I missed it/it's off topic. I'm trying to write out the count for a piece in common time (I can barely read sheets) and I have no idea what syllabic notation to use for the 32nd notes/demisemiquavers. From what I recall, "1 e & a" is used for semiquavers. All I've found online are people saying you simply don't count shorter notes with these syllables, and I haven't found anything for the Eastman Counting System either. Not counting them seems a bit unsatisfying for me, because you might also end up with hemidemisemiquavers...
If I'm not mistaken, you don't count every single note, because they are really fast and it would be really tough. Instead, you break them in groups of two. You count them as you would count 16th notes (semiquavers), but with two beats on each hit:
Another video which states the same:
1 e and a, but two notes on each syllable