Noise problem

"[email protected] [YamahaDX]" <[email protected]> 13 Sep 2019 03:35:02 -0700

Newsgroups	gmane.music.equipment.yamaha-dx
Message-ID	<[email protected]>

Hi,
 

 I sold my DX7II and bought a DX7. This one has a digital noise on some patches. I think its depend on the algorithm.
 I never had such noise on my DX7II or not so loud.
 Is this a knowing problem on DX7 or is there something out of order?