Possible Kirshenbaum / IPA quirks and glitches?

[cmrdt]

(en-us) short [A] is missing.. also [y-] (same as [i]) does not produce anything (if encounters character it cant handle, it quits the rest, & lack of error info) but does this right [@r] turns into ɚr
thus are glitches context-based?

io  ɪo
i:o iːo
I   i
@t@ əɾˈə

espeak-ng -X --tie --ipa ASCII, [t_vowel] [t_vowel-long] [t_vowel_t] ASCII, [consonant] [@consonant@] and trimming the results:

i   i   iː  i
y           
i"  i   i   i
u"  u   u   u
u-  u   uː  u
u   u   uː  u
I   i   iː  ɪ
I.  i   i   i
U-  ʊ   ʊː  ʊ
U   ʊ   ʊː  ʊ
e   e   eː  e
Y           
@<umd>  ə   ə   ə
@.  ə   ə   ə
o-  o   oː  o
o   o   oː  o
R<umd>  r   r   r
@   ə   əː  ə
R   r   rr  r
E   ɛ   ɛː  ɛ
W           
V"  ʌ   ʌ   ʌ
O"  ɔ   ɔ   ɔ
V   ʌ   ʌː  ʌ
O   ɔ   ɔː  ɔ
&           
&"          
a.  æ   æ   æ
a"  æ   æ   æ
A".         
A       ɑː  
A.          

m   m   m
M       
n[  n   n
n   n   n
n.  ɳ   ɳ
n^  ɲ   ɲ
N   ŋ   ŋ
n"  n   n
n<lbv>  n   n
p   p   p
b   b   b
t[  t̪  t̪
d[  d̪  d̪
t   t   ɾ
d   d   d
t.  t   t
d.  d   d
c   c   c
J   ɟ   ɟ
k   k   k
g   ɡ   ɡ
q   q   q
G       
t<lbv>  t   t
d<lbv>  d   d
?   ʔ   ʔ
P       
B   β   β
f   f   f
v   v   v
T   θ   θ
D   ð   ð
s   s   s
z   z   z
s.  ʂ   ʂ
z.  ʐ   ʐ
S   ʃ   ʃ
Z   ʒ   ʒ
C   ç   ç
C<vcd>  ç   ç
x   x   x
Q   ɣ   ɣ
X   χ   χ
g"  ɡ   ɡ
w<vls>  w   w
w   w   w
H       
H<vcd>      
h<?>    h   h
s<lat>  s   s
z<lat>  z   z
r<lbd>  r   r
r[  r   r
r   r   ɹ
r.  r.  r.
j   j   j
j<vel>  j   j
g"  ɡ   ɡ
w   w   w
h   h   h
l[  l   l
l   l   l
l.  ɭ   ɭ
l^  ʎ   ʎ
L   ɫ   ͡l
b<trl>  b   b
r<trl>  r   r
r"  ʀ   ʀ
*   ɾ   ɾ
*.  ɾ   ɾ
*<lat>  ɾ   ɾ
p`  p   p
t[` t̪  t̪
t`  t   t
c`  c   c
k`  k   k
q`  q   q
b`  b   b
d`  d   d
d`  d   d
J`  ɟ   ɟ
g`  ɡ   ɡ
G`      
p!  p   p
t!  t   t
c!  c   c
c!  c   c
k!  k   k
l!  l   l

[cmrdt]

whether to change gradual espeak's internal workings to more IPA based

[rhdunn]

See:

1. https://github.com/espeak-ng/espeak-ng/issues/25 -- Create a "jonathan" voice from the existing phoneme table data
2. https://github.com/espeak-ng/espeak-ng/issues/26 -- Support phoneme transcriptions in the phoneme definitions
3. https://github.com/espeak-ng/espeak-ng/issues/27 -- Support phoneme input modes

The [A] vowel is not supported in English because eSpeak uses [A:] for the PALM vowel. It also transforms the given phoneme input based on the specific language rules, which is why what you specify phonetically is not necessarily what is spoken/output.