pipe up

verb4

1. •
   To speak up, especially in a robust, assertive manner; to say something loudly and suddenly.

   • "You seem to have a lot to say," remarked Silver, spitting far into the air. "Pipe up and let me hear it, or lay to." — 1881
2. •
   To begin to blow more vigorously.

   • Once, for ten minutes, the sun shone at midday, and ten minutes afterward a new gale was piping up. — 1911
3. •
   To begin singing or playing musical notes on a pipe or similar wind instrument.

   • [T]he frogs in a neighboring marsh began to pipe up for the evening concert. — 1871
4. •
   (rare) To call, awaken, or summon, as with a musical instrument.