Ketron New OS Update 2.1.0_SD9/90/60

1) Here is the SD9 OS
https://www.ketron.it/en/software-2/sd9-2-1-0

2) Here is the SD90 OS
https://www.ketron.it/en/category/software-2/sd90-software-2

3) Here is the SD60 OS
https://www.ketron.it/en/software-2/sd60-2-1-0

3) Here is the SD60K OS
https://www.ketron.it/en/software-2/sd60k-2-1-0

If you have good contact with Ketron engineers, can you ask them to correct the problem of the SD1000, because it has 2 DSP, but one DSP has lower volume than the other one, so it is not possible to use it STEREO, and also, I can't change DSP1 for DSP2, they will not sound the same

I hawe a problem on the SD90 with that 2.10 software. It happened to me when I inserted a multisample and went to edit it, it would mute itself, and mute the whole keyboard. There would be no rhythm or sound. The only solution was to turn the SD90 off and on again.
I downgraded the operating system to 2.07 and now everything is fine, everything works, and I don't have any such problems. I even feel that sounds and rhythms sound better. Maybe I'm wrong, but I solved my problem with 2.07 os