Pipe

Boyd’s Bible Dictionary:

Flute
Type of perforated wind instruments, as the harp was of stringed instruments (1 Sam. 10:5; 1 Kings 1:40; Isa. 5:12).

Concise Bible Dictionary:

The simplest of musical instruments, often made of a reed, with holes to vary the notes. They were sometimes double, as seen on the Egyptian monuments, and in present use in Egypt: a number of them fastened together was called an “organ” (1 Sam. 10:5; 1 Kings 1:40; Isa. 5:12; Isa. 30:29; Jer. 48:36; Ezek. 28:13; 1 Cor. 14:7).
Shepherd boy playing to his sheep. Typical reed pipe.

From Manners and Customs of the Bible:

1 Kings 1:40. The people piped with pipes, and rejoiced with great joy.
The pipe was one of the most ancient, as it was one of the simplest, of instruments. It was originally merely a reed with holes perforated at certain distances, whence it derived its Hebrew name, chalit: bored through. As its use became more general it was made with greater care, and sometimes of other materials, such as brass, box-wood, horn, bone, or ivory. Sometimes a double pipe was used, one part being played with the right hand and the other with the left, and both uniting at the mouth-piece. The pipe was used for seasons of merriment or of joy. See 1 Samuel 10:5; Isaiah 5:12; Luke 7:32. It also served to enliven the journeys to the great feasts (Isa. 30:29), as music is now used in the East to entertain great companies of travelers. Sometimes, by reason of its soft wailing tones, it was used at funerals (Jer. 48:36; Matt. 9:23).

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