One of my dialectical dictionaries takes tone value 21 and compares it to Mandarin's neutral tone.
The same tone, coincidentally enough, had been described in the same way to me by a local native speaker (i.e.: tone value 21 - Mandarin's neutral tone).
While it's logical to me, it does seem like a little bit of a stretch.
Cantonese's fourth tone (at least according to jyutping) is also tone value 21, think 唔 m4 (meaning 不).
I can't seem to find any information talking about tone values with the neutral tone, I guess because it's not considered a tone to begin with.
does Mandarins neutral tone have any tone values associated with it?
if so, does it differ by region?
is it reasonable at all to say that tone value 21 is equivalent to Mandarins neutral tone?