The Duties of the Singers and Musicians
The singers and musicians were selected and set apart to their assigned function. There were a total of 288 singers (1 Chronicles 25:7-31) and 4,000 musicians (1 Chronicles 23:5). They were also divided into 24 courses. Therefore each course had 12 singers and more than 160 musicians. Unlike the singers, the 160 musicians were coming from several families. The ministry was subdivided among the families, and only one family of 20 to 30 musicians accompanied the 12 voice choir.
The real service of praise in the Temple was only with the voice. The instrumental music served only to accompany and sustain the song. The musical instruments used were mainly the Nevel (harp) and the Kinnor (lyre). The silver trumpets used in the Temple, blown by priests only, were not part of the instrumental music, but were intended for assembling Israel to worship at the Temple. The other musical instrument mentioned was the cymbal. But this "sounding brass" and "tinkling cymbal" also formed no part of the Temple music itself, and served only as the signal to begin that part of the service.
Nevel
The Nevel (translated to harp) was either a portable harp (left) or a lute (far left). Ancient harps generally had soundboxes and even soundboards made of skin stretched over a wooden framework.
Biblical references:
1 Samuel 10:5; 2 Samuel 6:5; 1 Kings 10:12; 1 Chronicles 13:8; 15:16, 20, 28; 25:1, 6; 2 Chronicles 5:12; 9:11; 20:28; 29:25; Nehemiah 12:27; Psalm 33:2; 57:8; 81:2; 92:3; 108:2; 144:9; 150:3; Isaiah 5:12; 14:11; Amos 5:23; 6:5
Kinnor
These pictures show two versions of the Kinnor (lyre). The lyre is box-shaped, with two arms and a yoke, and of an approximate average height of 50-60 cm. The design of the lyre is based on an ancient coin from the Second Temple era. The Kinnor is sometimes translated as "harp", but it is not a harp at all. In Jewish tradition, this instrument is associated with King David and is also referred as the "Davidic Harp."
Biblical references:
Genesis 4:21; 31:27; Nehemiah 12:27; 1 Samuel 10:5; 16:16,23; 2 Samuel 6:5; 1 Kings 10:12; 1 Chronicles 13:8; 15:16, 21, 28; 16:5; 25:1, 6; 2 Chronicles 5:12; 9:11; 20:28; 29:25; Psalm 33:2; 43:4; 57:8; 71:22; 81:2; 92:3; 98:5; 108:2; 147:7; 149:3; 150:3; Isaiah 5:12; 30:32
The Levite choir offered praises in the morning and evening services. They were trained in singing and skillful (1 Chronicles 25:6-7), and were free from other duties (1 Chronicles 9:33).