It's not gamelan, but this style of music is characterized by the three-stringed cak and the four-stringed cuk, named for the sounds they make, playing on the on and off beats, respectively. For 10 points each:
[10h] Name this Indonesian style of traditional music popularized by the singer Waldjinah (“WALD-jee-nah”). This music was created by the buaya darat subculture, which based it on fado.
ANSWER: keroncong [or kroncong; or krontjong; or kerontjong]
[10m] Keroncong has been heavily influenced by the music of this country, such as the mournful genre of fado sung by Maria Severa.
ANSWER: Portugal [or Portuguese Republic]
[10e] A distinctive feature of keroncong music is that the cello and string bass are usually played in this manner, in which the strings are plucked rather than bowed.
ANSWER: pizzicato
<Benjamin McAvoy-Bickford, Auditory Fine Arts>