"The majority of local music at WMSE was recorded by local area bands on cassettes and transferred to a medium in broadcasting called "carts". A cart looks like an eight track tape cartridge except it contained only one song. So WMSE accumulated hundreds of band's songs painstakingly transferred them to cart for airplay. We've amassed quite a collection of local music from the start of the station in 1981 up until recording and transferring music to CD became the standard method. This collection is a living testament of what once was Milwaukee's thriving music scene and cassette culture." - Station Manager, Thomas S. Crawford
For those who haven’t heard of WMSE, let Keith Brammer (of Die Kreuzen) school you.