This video illustrates the waterbell responding to music and voice.
audio clip 1 (10 sec.): Jazz Samba (Joao Gilberto - guitar, vocal) recorded 1963 {© Verve LP V6-8545}
audio clip 2 (8 sec.): Waters of March (Elis Regina - vocal) recorded 1974 {© Verve LP 824 418-2}