A new Web site being launched in San Francisco provides fans of innovative music with free information about the history of new music.

Other Minds, a San Francisco-based nonprofit group dedicated to presenting and celebrating new music, marks the 90th birthday of late composer Lou Harrison with the launch of www.radiOM.org. The site offers access to streaming audio and video programs that span the history of new music.

The site was unveiled at a Monday morning press conference by Charles Amirkhanian, Other Minds artistic and executive director, and former music director at the Berkeley-based KPFA radio.

RadiOM.org includes a multitude of archival material; its 4,500 hours of recorded material includes 3,500 hours of audiotape recordings from the KPFA radio music department collection. Other highlights include recordings of past Other Minds Music Festivals; materials from the private archive of composer George Antheil; selected programs from the Cabrillo Music Festival, and other rare and unusual recordings of classical music, jazz and experimental forms.