How do I adjust the nav voice so that it's actually audible when i'm listening to music from different AV source? When i using SD for audio, the nav voice is quite loud, consistent with the master volume. But when the AV source is either CD or radio, i can hardly hear the nav voice guidance - eg. main volume would be on 50 and can't even hear voice guidance.
Have tried adjust in the nav sound settings while either CD or radio is playing and makes no difference - it seems the nav sound setting is set regardless of current AV source.
Can anyone shed some light? Model is F910BT
