Passable/Possible

How do pronounce the first vowel in these two similar words?

Paul N.

My pronunciations are

passable /p{sIbl=/
possibe /pA:sIbl=/

I believe in RP,
passable /pA:s@bl=/
possibe /pQsIbl=/

so, passibe(RP) and possible(GA) can be very similar.

passable: ['p_h6:s@b=l]
possible: ['p_hOs@b=l]

AusE

In my New England accent:

passable - ["p{s@bl=]
possible - ["pQs@bl=]

In General American they'd be:

passable - ["p{s@bl=]
possible - ["pAs@bl=]

And as Guy said (and going by the Cambridge Online Dictionary), in RP they'd be:

passable - ["pAs@bl=]
possible - ["pQs@bl=]

Oh, I forgot to note, in RP, the "-ible" of "possible" could be [Ibl=], depending on whether or notyou have at least a partial weak vowel merger. The Cambridge Online Dictionary does list the pronunciation as ["pQs@bl=], though.

And in General American, some speakers could use [Ibl=] for both words.

I myself have:

<passable> : /"p{sI%b@l/ -> ["p_h{.sI:.%b5=]
<possible> : /"pAsI%b@l/ -> ["p_hA.sI:.%b5=]

Such is effectively the same as the GA version with [Ibl=] rather than [@bl=], but I wanted to point the vowel lengths and that [5=] rather than [l=] proper is likely to be used.

Many thanks for helping me with this vowel's length.

Take care
Paul N.