The 20 musicians playing these instruments are members of Dharma Swara, a New York-based group that specializes in Balinese gamelan, the indigenous music of the Indonesian island just east of Java.
VOA: standard.2010.07.01
In particular, their assessments have depended heavily on measurements of temperature from ground-based instruments.
Confirming that these candidates are actually planets can be a tricky and laborious process, requiring follow-up observations by ground-based instruments or further analysis of Kepler's data.
Follow-up observations are also being planned using other ground-based instruments, as well as several space observatories, including the Hubble Space Telescope and the infrared Spitzer Space Telescope.