WeepingElf wrote: ↑Sat Feb 11, 2023 8:30 am
As slack voice is (according to Wikipedia) closer to voicelessness than stiff voice...
Uh... I don't know about this. Stiff and creaky voices involve glottal/laryngeal restriction, and slack and breathy voices involve glottal/laryngeal relaxation, so they tend to pattern more with voiceless and voiced, respectively. The Austroasiatic languages give examples of creaky or breathy merging with voiceless or voiced (respectively), as well as creaky or breathy emerging from voiceless or voiced (respectively), but I'm not sure about any examples of a phonation distinction and a voicing distinction lining up the other way around. Wikipedia mentions that stiff voice is often
transcribed with voiced glyphs, but this is probably because IPA doesn't have neat representations of stiff and slack the way it does for creaky and breathy. I think this tells us more about transcription and less about phonology.
With that in mind, I think a better way to think about the phonation theory is this:
T: stiff/creaky
D: none
Dh: slack/breathy
Remember that roots can be T...D, D...T, T...T, Dh...D, D...Dh, and Dh...Dh, but not T...Dh, Dh...T, or D...D. This can be reworded as:
each root has one phonation: stiff/creaky or slack/breathy. It may also include consonants which are neutral (i.e. D).
This explains the prohibition against D...D roots: they have no phonation. It also explains the prohibition against T...Dh and Dh...T roots: they have too many phonations. You might say "Well, what about roots with mobile s? They can retain the form sT...Dh!" I would submit that these are not actually stiff/creaky, but simply a form of D. The change T...Dh > Dh...Dh is matched by the change T...Dh > D...Dh after mobile s, which in turn experiences secondary devoicing without taking on any phonation distinction. When the daughter languages subsequently lose the phonation distinction, these sT clusters seemlessly merge with the voiceless plosives (this also dovetails neatly with Germanic, where sT does not yield fricatives).
This yields the following developments.
A) Italic, Hellenic, Indo-Iranian: The slack/breathy distinction survives as aspiration or fricative...ization, and the stiff/creaky - neutral distinction is reworked as voiceless - voiced, pretty reasonable considering that stiff/creaky phonation restricts the ability to provide voicing to a consonant.
B) Germanic, Armenian: The stiff/creaky series becomes more defined by voicelessness, again not surprising, but this voicelessness is exaggerated as aspiration and eventually fricativization, to better distinguish this series from the neutral series, which is then free to fulfill its destiny as the most unmarked consonant imaginable: plain voiceless. The breathy distinction was then irrelevant, but in the new voicing paradigm, slack/breathy easily shifts to being defined by the feature +voiced.
C) Celtic, Balto-Slavic, Albanian: The stiff/creaky and slack/breathy series are reanalyzed as voiceless and voiced, with neutral falling into the latter. I'm not sure how Winter's Law fits into this, but then Winter's Law isn't obviously intuitive with the traditional system, either. Albanian's development of D often yields affricates, which could be the result of the neutral series being insufficiently distinct, and developing an off-glide (off-fricative?).
Here are some possible objections.
A) "But in Armenian, sT is aspirated. It doesn't develop the same way as s+D." Yeah, that's Armenian. I don't know what you want from me.
B) "But in Indic, T+H gives voiceless aspirates, while D+H does not. Why would stiff/creaky and neutral yield different results under the influence of laryngeals?" I believe that the emergence of voiceless aspirates in Indo-Aryan is a fairly late development. The ancient Indians were famously accomplished grammarians, and the T D Dh system offended them just as much as it does modern linguists.
C) "Can we circle back to Winter's Law?" Winter's Law isn't universal in Balto-Slavic, and the situation is still subject to fierce debate. One possibility is that in coda position, neutral consonants were seen as lower weight than other consonants. I don't know, but like I said I'm not sure there is an obvious explanation in other theories, either. Glottalic theory might explain the rising tone (which I'm not 100% certain is even what's going on with acutes), but it can't explain why coda ejectives would cause lengthening.