As it is the middle of the night and I cannot sleep I have spent a time trying to solve this age old problem! It seems that this is issue is common to many makes and I did find a number of questions the same as yours on the Saab sites sadly no one seems to offer a resolution.. The only suggestion was to switch the volume to minimal. I agree entirely that it is not very vocal.
I think you may need a Tech2 as that seems to offer a partial solution.
I think you may need a Tech2 as that seems to offer a partial solution.