Thank you for the feedback, I rerecorded it, hopefully it will sound better. There is quite a lot of audio missing and I'm trying to add as much as I can between the band playing in the classroom next over, my daughter babbling at home, or my dogs making as much noise as humanly possible.
I also opened this page because I was wondering in general about word stress. Is there any way to know where to put it? In Spanish there are rules and accent marks. In Italian, no. Sometimes even mother-tongue Italian news reporters make a mistake on where word stress is supposed to fall (usually on names of small villages).
Here's a page with a description of Latin's accent rules.
The basic rule seem fairly straightforward.
"Accent the second-to-last syllable, unless that syllable is short. Accent the third-to-last syllable if the second-to-last syllable is short."
(The design of the webpage is , um, a little retro. Sometimes that's not a good sign. But it is from a respected university, so I hope it's all good.)
There is more about Latin here:
It's worth knowing how to know when a syllable is "long".
There are 3 possibilities: the vowel itself is long (unfortunately, Duolingo doesn't use the long marks, so newcomers can't accurately judge this);
there's a diphthong (ae, ou, au, oi, ei--but not every sequence of 2 vowels in a row forms a diphthong);
the vowel is followed by 2 consonants: as in puella, in which stress falls on the e, made "long" by the 2 l's.
That's right. Also:
- h does not count as a consonant
- x and z count as 2 consonants
- if p, t, c, b, d, g (some say f, also) are followed by l or r the syllable is short (in prose).
That third bullet is not so difficult as it may look at first. L and r are easy to remember, and if you remember p, t, c/k, then b, d, g are just the same sounds voiced (i.e., w/ a little noise in the throat).
The third bullet point is also true in poetry: the poet has the option of considering the 2 consonants (say, t + r, as in patrem) either as a BLEND into 1 consonant, in which case the a of patrem is short , or as 2 separate consonants, in which case the a of patrem is long .
We can hear in the recording that «theatro» is being pronounced as "theachro", with a ch sound. I wouldn't recommend this pronunciation; basically if you pronounce it like the Spanish or Italiano teatro (with the tr being pronounced clearly), you'll be on the right track, although in Classical Latin they are also supposed to have aspirated consonants with a h after them, so optionally you could practice that too: in the case of th, it's almost like the English "top", whose t is aspirated by some speakers.
Wiktionary recommends this pronunciation for «theatrum»: tʰeˈaː.trum/.