Metal has a small but not insignificant presence in Singapore's music scene. Many metal bands such as Iron Maiden, Exodus, Morbid Angel, Slayer, Dream Theater and Helloween made Singapore a stop in their tour, at venues such as Fort Canning Park and Singapore Indoor Stadium. Small to medium scale gigs are held almost weekly at locations such as BlackHole212 or The Substation. Most recently, on 15 February 2011, Iron Maiden played to a crowd of 12,000 at the Singapore Indoor Stadium. There have also been many notable local metal bands from many varying subgenres in the growing underground scene. Special mention includes:   There is however little support for metal in Singapore's mainstream media. The heavy metal scene in Singapore therefore has established its own ways of disseminating information by utilizing popular internet based social mediums such as Facebook, Twitter and blogs. Some Metal music of this generation may be featured occasionally on Brader Bo's show, Vicious Volume of RIA 89.7fm. Two Singapore rock bands of the 1970s and 1980s, Heritage and Zircon Lounge, showed tendencies to create music beyond conventional rock idioms. In the late 1980s, Corporate Toil baited audiences with noisy electronic performances influenced by industrial/new wave bands like Suicide or Einstürzende Neubauten. In the 1990s, Kelvin Tan produced literally dozens of albums of avant folk and improvised guitar, as well as assembling the short-lived Stigmata featuring bassist Ian Woo and saxophonist Kelvin Guoh. Zai Kuning, largely known as a visual artist and dancer, lived for a period in Japan and collaborated musically with Tetsu Saitoh, a famed Japanese cellist. Zai also created his own form of Malay folk and gypsy blues music, singing incantations in his deep tenor while playing a loose form of open tuning guitar. By the late 1990s and into the 2000s, a group of experimental laptop artists appeared: George Chua, Yuen Chee Wai, Evan Tan, Ang Song Ming, and Chong Li-Chuan, the last having received the bachelor's and master's degrees in music at Goldsmiths College, University of London. Straddling the world of digital effects and acoustic instruments was the duo aspidistrafly, who eventually gained an enormous following in Japan, producing their own music and running their kitchen.label. The Observatory, a supergroup formed from the ashes of Leslie Low's folk rock Humpback Oak trio, have been widely regarded as one of the best bands in Singapore, with Yeow Kai Chai of "The Straits Times" writing, "No other Singapore band, past or present, has captured the imagination quite like The Observatory."