Hi, Yorgos
Thank you for your reply.
The reason why I'm on an previous os version, is because each time I updated, new bugs were introduced....so I lost my faith and stopped bothering with this. Then I bought some Elektron stuff and concentrate in learning them, leaving my Tempest with this old OS. (By the way, Elektron OS development is incredible, I had no bugs problems at all and they release updates for products for years...even though they have mk2 versions that replace the previous, they do not leave old customers without updates for their mk1's!)
I understand from your answer that the pads can play more than one at the same time, and that this was a bug intruduced at some point with the OS that I have installed.
I will follow your advice, and hope that my Tempest will perform better with the last OS.
Thanks again!