How to pronounce 音階 in Cantonese (4 out of 6):

音階起跌 拍子改變
The pitch is up and down, the beat is changing.

Cantonese Sentence Breakdown

音階 jam1 gaai1
scale
hei2
to rise
to raise
to get up
to set out
to start
to appear
to launch
to initiate (action)
to draft
to establish
to get (from a depot or counter)
verb suffix, to start
(before place or time) starting from
classifier for occurrences or unpredictable events: case, instance
classifier for groups: batch, group
to stand up
to go up
to happen
to take place
to uncover
daat3
to drop
to fall
to tumble
Taiwan pr. [dié]
to stumple
to slip
to stamp
a fall
拍子 pak3 zi2
rhythm
改變 goi2 bin3
change