Five strikes with a steel hammer on a 100 year old, 200+ lbs blacksmiths anvil. Recorded with and akg c2000b, presonus digimax fs mic pre to an alesis hd24 digital recorder.
Recording of myself playing a home-made instrument constructed from a large suspended metal door affixed with bits of thin aluminum sheeting of varying sizes and bent at varying angles. I "played" this by striking and plucking the bits of aluminum and recording the results through a piezo contact mic adhered to the door.
My house's entrance door hinges were creaking and made this weird noise. Recorded on a sony xperia z3, and slightly edited to remove the majority of background noise.
Two metal singing bowls, approximate notes d and a, tapped with a felt-covered beater (the d first, then the a a moment later). Recorded with tascam dr-05, edited for simple fade in and out in audacity.