- This is a standard doubling, starting with a High G Gracnnote.
- As the name "doubling" implies, produces two sounds.
- If coming from High G, D Doublings will either replace the G Gracenote with a Thumb Gracenote, or omit the G Gracenote altogether. If the G Gracenote is omitted, will often be referred to as a "half doubling."
- If coming from High A, you will omit the G Gracenote altogether. This is often referred to as a "half doubling".