CK_01.wav - A recording of the Centauri Bell, a large metallic instrument inexplicably found on the otherwise barren and deserted 4th planet of the Proxima Centauri system. 

CK_02.wav - Sample of the Io flute, a primitive wind instrument found in the excavated ice caves on Io.

CK_03.wav - Rare recording of the Martian Gong, a small tam-tam used in religous ceremonies