You gain an expertise die on checks with any musical instrument you are proficient in (including any musical instrument proficiencies you gain in the future). You may learn or teach an instrument proficiency in half the usual time using the [[00-Balance Of Powers/3-Mechanics/7-Adventuring/Between Adventures/Train|Train]] downtime activity and suffer no penalties for not having a tutor. Source: Venture Forth #adventuringTricks #musicalInstrumentBonus #enhancedTrain