Bug#647225: texlive-lang-cyrillic: missing font declaration for T2A/aer
Further I'm not 100% sure if ae is really still needed in times of
latin modern and cm super. Ralf, are you still on the list? Can you
Catching up ... Given Latin Modern, ae is obsolete from my point of
view. Actually the above example uses Latin Modern fonts in the end.
I'm sorry I really don't know anything about Texlive fonts. Does this
mean that the best solution would be to incite the author of Songwrite
to use a more modern font? In this case which one?