Dragonsinger by Anne McCaffrey
Menolly drifted on thoughts of triumph until sound invaded her reflections. Male voices, laughing and rumbling in conversation, carried on the clear night air. The voice of harpers; tenor, bass and baritone, in amused, argumentative, cajolling tones, and one querulous, sort of quavery, older, whiny voice. She didn't like that one. Another, a velvet-soft, light baritone, rose above the cranky tenor, soothing. Then the Masterharper's deeper baritone dominated and silenced the others. Though she couldn't understand what he was saying, his voice lulled her to sleep.