Normally, a flam tap is quiet on the grace note. Gadd inverts this, placing the accent on the flam and burying the primary stroke. A Gaddiments PDF will include a transcription of this from his solo on "Aja."
Right hand and left foot play 2, while left hand and right foot play 3. This is Gadd’s secret for "space" in his fills. PDF charts will show this broken down into a 12/8 grid. gaddiments pdf
Learn how Steve shifts basic patterns to create that signature "Gadd" displacement. Normally, a flam tap is quiet on the grace note