When played by a character proficient in music, these pipes can be used to create a variety of sounds. To a listener the source of the sound will seem to be anywhere within 60 feet of the piper. The possible sounds that can be created are: wind blowing, laughter, whistling, bird calls, moaning, footsteps, crying, mumbled voices, screams, running water, or creaking. (Note: The DM can rule that other similar sounds are possible.)
Bards are able to generate any sound with these pipes, up to and including the volume of eight yelling men. The only limit is that the sound can't imitate any form of understandable, verbal communication. Charlatans (a bard kit), however, can generate clear speech.