Within two months LIVE365 slipped two positions among the top music sites in minutes per visitor, per month, going from 23.1 minutes to 16.5 minutes in September, according to comScore Media Metrix.

Meanwhile, Clear Channel Radio’s Online Music & Radio (CCOMR) network maintained the second-place spot for the fourth consecutive month, at 18.6 minutes per visitor, behind MTV’s 19.3 minutes.

CCOMR is fifth in monthly uniques among music sites, according to the comScore data, behind Yahoo Music, MySpace Music, AOL Music and MTV.com.

Among radio broadcaster sites, Clear Channel remains the outright leader with 9.8 million monthly unique visitors, according to Nielsen/NetRatings; the next closest is CBS with 3.0 million.