Hi Frank,
> What's really puzzling to me is in some of those words, the "jj" sound
> is similar to a english "j" sound, in other words, it sounds like "ch",
> in others it sounds like "t". Am I going mad?
If you are I am too. ;-)
The recording of "vīriyasambojjhaṅgaṃ" certainly seems to have a stop
rather than an affricate to me. (Ie., it sounds like
vīriyasambotthaṅgaṃ.)
> BTW the audio dictionary at worldtipitaka is an awesome resource.
I had never seen this, it's fantastic. (Though it's a bit of a shame
that the IPA transliterations are images rather than actual Unicode.)
-Pat