As I recall, there are two different volume settings - one for alerts and one for messages. Both are configured on the SOUND page in the configuration menu. The tone volume is adjusted via "Message Volume".
Hopefully the G3Xperts will weigh in.
Locust Grove, GA
DA20-A1 "Princess Amelia" - gone home to Amelia Island
RV-7A Phase 2
RV-10 under construction at Synergy Air South