Can some one check something ?
I have a style glitch with choir
You specially hear it good in the Etherealvoices style
If you disable every sound on variation 4 except the voices and you change chords you get a high pitch millisecond effect sound after that the chord is fine.

I have that style with my SX920 keyboard. Yes, if you count to 3 and then change there is no glitch sound. It only happens if I change chords to quickly.

 

Thanks bro