Pak Wawan wrote Pepak, which means “Complete” to fill a gap in the classical gamelan repertoire. There is no other gendhing bonang piece written in pelog nem tuning. They exist in bounty in both pelog lima and pelog barang. Because of this hole in the repertoire, during the Maulud festival at which the ceremonial Sekaten instruments are played, there are no appropriate gendhing bonang songs to play in the early afternoon (siang) when pelog nem should be played. Instead the groups play gendhing rebab in a bonangan style instead. Pepek fills that gap and completes the repertoire. The piece is also complete in another sense with complete technique and a range of composition techniques.