DAB trials have been conducted on the L Band (1998)<ref>http://www.ofta.gov.hk/en/broadcast/report_ph1.pdf</ref> and on Band III (2004)<ref>http://www.rthk.org.hk/about/digitalbroadcasting/faq_e.htm</ref>. The trials involved all three radio stations: RTHK ([[Radio Television Hong Kong]]), CRHK ([[Commercial Radio Hong Kong]]), and MB (Metro Broadcast<ref>http://www.metroradio.com.hk</ref>).