How to pronounce 谈 in Cantonese (5 out of 8):

先不这个
Let's not talk about this.

Cantonese Sentence Breakdown

sin3
early
prior
former
in advance
first
for now
ancestor
pioneering
only then
fau2
same as否 (dated used in old text only), not
no
negative prefix
a final particle
tam4
talk
ze2
this
go3
measure word