There are no adjustment options, Robert, perhaps you should try moving the radio and aerial to a new location so that the reception is better. It works fine for me...
Also, I have only just received the message from Galaxus to answer this question. Best wishes and have a nice Sunday, Sydeboelleli

I have also not found a setting for raising and lowering pitches (equaliser function).
There is a setting [DRC] which, according to the manual, has the following function: "Compresses the dynamic range of a radio signal so that the volume of soft sounds is increased and the volume of loud sounds is reduced."
You can set [Off, High, Low]. However, I have not noticed any difference.
Best regards Josef

How do I adjust the pitch of the sound on my radio so that the sound is clearer?