Does any canonical sutta say you can attain enlightenment *while* chanting? I've heard a couple of mentions (but seen no direct reference) that there is a (presumably canonical) formal list of certain activities that you can attain enlightenment during.  I'm guessing it's the "sudden" the kind of enlightenment which is being implied in this list (not "gradual").

This list includes formal sitting meditation, and chanting. Yes, you can apparently attain enlightenment right in the middle of a chant you are doing.

Can anyone point at a particular canonical Sutta that says this?  Also, I do not recall even one Canonical reference to any arahant claiming they attained their full enlightenment during chanting. And this includes the Theragata, and Therigata. Can anyone else remember a person in the Canon who said they were enlightened during chanting?
I posted an answer here, over at Sutta Central Forum:

... in the Aṅguttara Nikāya The Book of the Fives, Sutta 26, &quot;Liberation&quot;, the &quot;five bases of liberation&quot; are listed.
Number three is &quot;Reciting the Dhamma&quot;. The pali term for &quot;Reciting&quot; is &quot;sajjhāyaṃ karoti&quot;, which can also be translated as &quot;chanting&quot;, however the chanting referred to here must be deeply understood by the one chanting. That is to say, the type of chanting here is not as in incanting a mystical, magical spell in an arcane language, where you don't know what the words mean, where the power is inherent to the sound of the words.