soundboard

Etymology

sound + board

noun

1. (music) A wide, flat board placed within, or forming part of the body of, a musical instrument in order to improve vibrations and increase volume.
2. (audio engineering) A mixing console used to combine and blend different audio sources to a single output.
3. (figurative) A sounding board.
   Then, as now, they spent their days walking around the city they love, frequenting favorite restaurants or cooking meals at home, and serving as each other’s creative soundboard. February 3, 2008, Molly Reid, “Sean Yseult and Chris Lee”, in New York Times
4. (Internet) A control panel offering playback of various sound effects.
   Check out these celebrity soundboards and play prank phone calls on your friends, family, and co workers... 2007, starmuscle@gmail.com, “Celebrity Soundboards”, in alt.gossip.celebrities (Usenet)