Tapping large water bottles (metal) against a leg to hear them make melodic sounds. You can hear the slosh of the water inside and the resonant tone. Noise reduction and amplification were applied to this sound using reaper.
*1 step in 72 equal temperament on C. Equal-tempered: 21/72:1 = 16.67 cents. MIDI pitch bend: 43,69 Created in Sibelius with midi pitch bend on 69 for 15.625 cents rather than 16.667. New version a PU on 43,69 for 16.6748046875 cents.