Otto Sidharta has been played on NTS shows including Pete Goes To Town w/ Pete Swanson, with Ngendau first played on 17 January 2018.

Otto Sidharta was born in Bandung, Indonesia November 6, 1955. In 1978 he studied music composition in Jakarta Institute of Arts under guidance of Slamet Abdul Sjukur, in 1984 he continue his post graduate study for composition and electronic music with Prof. Ton de Leeuw in Sweelinck Conservatorium Amsterdam.

Sidharta's interest in using environmental sounds to express his musical ideas developed when he was a student at the Jakarta Institute of Arts (Institut Kesenian Jakarta). He performed his first electronic music piece, Kemelut, based on water sounds in the First Indonesian Young Composer Festival (Pekan Komponis Muda) in 1979. In 1979 he collected some nature and animal sounds on Nias, in the Borneo (Kalimantan) jungle, Riau islands, and some other remote places. These sounds were used as material for some of his works such as Ngendau, Hutan Plastik and East wind. And some others.

Beside being a composer, Sidharta used to be a Chairman of both the Music Committee of Jakarta Art Council (Komite Musik Dewan Kesenian Jakarta) and Indonesian Composers Association (Asosiasi Komponis Indonesia). He teaches at Jakarta Institute of Arts (Institut Kesenian Jakarta), Sekolah Pascasarjana IKJ ( IKJ Graduate School) and in Cantus (Music Education and Information Center, Jakarta). Furthermore, he is the Music Director for the Nusantara Symphony Orchestra (Orkes Symphony Nusantara).

For Supplement/Upstream, Sidharta created Wind of trade, a soundscape based on the sounds and voices associated with old Dutch and Indonesian culture, such as sounds from nature, markets, street vendors, trains, ships and children playing.