Scalloped fretboards have recessed or scooped-out areas between the frets, effectively creating concave surfaces. This unique design is often used to improve playability and provide easier access to certain techniques, such as tapping and hammer-ons.
While it is possible to play slide on a scalloped fretboard, the concave surfaces can make it more difficult to achieve consistent contact and control with the slide, especially when fretting notes or vibrato. The recessed areas can also introduce unwanted noise or buzzing if the slide makes contact with the fretboard.
Additionally, the scalloped design can make it challenging to find the correct fret positions, as the visual references provided by traditional frets are absent. Players may need to rely more on their ear and muscle memory to accurately fret notes.
Overall, playing slide guitar on a scalloped fretboard can be more demanding and require a greater level of skill and precision compared to playing on a standard fretboard. However, with practice, it is possible to achieve unique slide sounds and techniques on scalloped fretboards.