Though what Sam originally did wasn’t intended, it was actually a cool effect. After sounding P.3 with the bachi, his ring finger did sound P.4 when he touched the string. However, P.3 would sound again after he completed the pull-off. That means after his bachi strike, he executed BOTH an uchi (hammer-on) immediately followed by a hajiki! That’s a lot of variety. Even if it wasn’t initially intended, it’s a great way to add tonal flavor to the shamisen!
Give that a try and see how it sounds. Have other tricks for executing a clean hajiki? Share them in the comment box below!