from one day to the next, the buttons for mute and volume on the device no longer have a function.
goes on and off.
@jolle
We apologize for any inconvenience caused during use.
Since last week, we have confirmed that the mute button and volume control buttons on the RS520 do not work.
The cause has been found and resolved, and will be reflected in the next SW update.
It may be inconvenient, but I would like you to use it as described below.
Please unplug the power cord connected to the product and then plug it back in.
Thank you
I did it by myself and now the buttons work again
Many thanks for your answer