Adam Clarke on Psalms 149:3

Let them praise his name in the dance - במחול bemachol, with the pipe, or some kind of wind music, classed here with תף toph, the tabor or drum, and כנור kinnor, the harp." מחול machol," says Parkhurst, "some fistular wind-instrument of music, with holes, as a flute, pipe, or fife, from חל chal, to make a hole or opening." I know no place in the Bible where מחול machol and מחלת machalath mean dance of any kind; they constantly signify some kind of pipe.