Beginner player starting DAA or DAd? in Mountain Dulcimer Beginner's Area Posted March 4 I recommend DAd tuning to start as it's become the most common and you'll find more resources (tab/workshop/videos) for learning it. Having the middle and melody strings tuned differently also gives access to more notes without moving your hand by playing across strings and allows for playing wider chord voicing. On DAA the middle and melody string gauges are often the same. For DAd, the melody is usually a lighter gauge. You can use a string gauge calculator to dial in the exact gauges for your instrument based on VSL, but some common sets of gauges for DAd are .024, .013, .011 or .025, .014, .012. I'd lean to slightly lighter gauges on the double melody string as it requires twice as much pressure to fret as a single string of the same gauge.