Franco-American folk-rock duo The Whispering Tree had the top album (Invisible Forces) and five of the month’s most-played songs on folk radio during September 2018, while eclectic Celtic folk and roots-rock duo House of Hamill had the month’s #1 song. So say charts compiled from radio playlists submitted to FOLKDJ-L, an electronic discussion group for DJs and others interested in all folk-based music on the radio. [The monthly top albums and songs charts are posted on AcousticMusicScene.com, with permission. To view them, click on the headline.]