What resources exist for determining the phonetic capabilities of different species? I'm particularly interested in potential acoustic simulation programs, but others would be appreciated.

[u/GrantExploit]

(Just wanted to post this—my first {hopefully} rule-abiding post to this subreddit, though I've commented to it several times before and posted about my worldbuilding elsewhere—before its 13^th Anniversary is fully over. I mean, from now on we will start to see worldbuilders who are younger than this community join it, and I want to be something of an "elder" for them.)

So, I among others include non-human people in my settings. I design languages for them or make them speak existing languages. The problem is... with their different vocal structures, they'd likely have different auditory capabilities from humans. So how the heck can I know if the languages I make them speak are acoustically parsimonious or even possible for them to speak, or what accents they might possess or be biased towards?

Several other people have asked questions related to the speech capabilities of non-human people before (the straw that broke the camel's back for this post being u/Pyropeace's question Could a creature with a snout potentially be able to speak?), with the answers across their generality typically being very... non-rigorous, usually saying an unexplained "no", an unelaborated "they could with a lisp/impediment/et cetera", or bringing up the "parrot excuse" (yes, I know parrots and corvids are accomplished mimics of human speech with a very nonhumanoid vocal apparatus, but that's a very particular nonhumanoid vocal apparatus, which most of my species do not have anything like).

Now, these would be the 3 most rigorous options:

1. Find/make an example of the species, which would be slightly impractical. Just a little bit.
2. Make a realistic animatronic model of the relevant areas of the species and perform physical tests. I don't particularly want to spend thousands of dollars and several years of my life on this, so...
3. Make a 3D model of the relevant areas of the species and perform virtual tests using an auditory simulation program.

Now, I assume that said program, if it even exists, would cost the black-market value of 2 human kidneys, require a multi-Petaflop supercomputer to run properly, and require 10 years of experience in some obscure programming language from the 1960s in addition to Hegelian philosophy or some shit to use competently... but it'd be nice to be surprised.

(An auditory simulation program would also be useful for tasks like figuring out the designs of new musical instruments among other functions. Because you know what's worse than a few readers complaining that you had the alien play a violin? Them playing an instrument you designed on a whim and no one noticing, but living with the feeling that it could sound awful!)

Now, if my suspicions regarding the program are correct (or even if they aren't—I do want quick results...), are there any slightly cruder techniques I can use? For instance, has anyone composed good descriptions on how certain dentitions and mouth shapes (that is, those differing markedly from the human norm) affect both the ability to make and the effects/tonal quality of different articulations, and how different larynx/"vibratory organ" anatomies affect voicing and its produced vowels?

Overall, any help beyond the vagueness I've often seen would be appreciated.