WFMU broadcasts to the New York/New Jersey metropolitan area and beyond over 91.1 and WXHD 90.1 FM and Internet streaming. Their studio signal reaches their 90.1 transmitter in New York's lower Hudson Valley via satellite feed.

Station manager Ken Freedman installed a 5GB iPod at the transmitter in Mount Hope to cope with the inevitable loss of the satellite feed during the thunderstorm season. By using a phone to dial in to a remote control unit at the transmitter site, station staff can switch to the iPod instead of satellite audio. The Apple device is set on continuous random play from a playlist containing the extensive collection of "Live at WFMU" CDs (live music recorded at the radio station's studios).