From Proto-World

Tones
Tones dissimilated as phonemic features in Proto-B, though there exists indication of residual tone. It would appear that tone was the primary motivator of sound change in consonants from Proto-World to Proto-B. As such, the Consonants section below contains more information on tonal diachronics.

Consonants
∅ > ʔ > V˥_.
∅ > ɦ > _V˥˩.
ʔ > ɦ > ʁ / V˥˩_., ._V˩
ʔŋ > k
b > p  / ._V˥
b > pˀ / V˥_.
b > v / V˥˩_.
bβ > pʰ  / ._V
bβ > pˀ / V˥_.
bβ > pˀ / ._V˧, V˧_.
bβ > v / V˥˩_.
bβ > pˀ / V˩_.
d > t / ._V˥
d > tˀ / V˥_.
d > ð / V˥˩_. > z
ð > z
ð > s / ._V˥, ._V˥˩
f > v / ._V˩
g > k / ._V˥
g > kˀ / V˥_.
g > ʁ / V˥˩_.
ɢ > q
ɢ > q > kˀ / V˥_.
ɢ > q > ʁ / V˥˩_.
ħ > ɦ > ʁ / V˥˩_.
j > ç / ._V˥
k > kʰ / ._V˥
k > kˀ / V˥_.
k > x / V˥˩_.
k > g / ._V˩
kʰ > kˀ / V˥_.
kʰ > x / V˥˩_.
kʰ > k / ._V˩
l > w / _.
l > ʰl / ._V˥
ɬ > ʰl
ɬ > l / ._V˩
ɬ > z / V˥˩_., V˩_.
m > ʰm / ._V˥
ʰm > m / ._V˩
n > ʰn / ._V˥
ŋ > k / ._V˥
ŋ > kˀ / V˥_.
p > pʰ  / ._V˥
p > pˀ / V˥_.
p > f / V˥˩_.
p> b / ._V˩
pɸ > pʰ  / ._V
pɸ > pˀ / V˥_.
pɸ > pˀ / ._V˧, V˧_.
pɸ > f / V˥˩_.
pɸ > pˀ / V˩_.
q > kˀ / V˥_.
q > ʁ / V˥˩_.
t > tʰ / ._V˥
t > tˀ / V˥_.
t > θ / V˥˩_. > s
t > d / ._V˩
θ > s
θ > z / ._V˩
ʃ > ʒ / ._V˩
w > ʰw / ._V˥
w > ʔ / V˥_.
x > kʰ
x > kʰ > kˀ / V˥_.
x > kʰ > x / V˥˩_.
x > kʰ > k / ._V˩
z > s / ._V˥
ʒ > ʃ / ._V˥

Vowels and Syllabic
ɑ > ɔ, a / _#
S.S. > SC. > əSC
S > əS
S > ʔəS / #_