Long-time Washington DC/Baltimore Alternative station WHFS (W High Fidelity Stereo) will return to the airwaves at 97.5 FM on August 1. In the 1960s and '70s WHFS was a Freeform Rock station located at 102.3 FM and had been a Modern Rock station until 1983 when they moved to 99.1 FM. HFS flipped abruptly to Tropical Latin "El Zol" WLZL in 2005. WHFS is officially the HD-2 feed of WWMX at 106.5 FM and translated on W248AO at 97.5 FM licensed to Baltimore, Maryland.
EDIT: I just finished watching a documentary titled "Feast Your Ears: The Story of WHFS 102.3". This excellent feature-length doc focuses on WHFS' years as a Freeform Rock station with tons of interviews from station employees and performers who were heard on--and were fans of--the beloved station. As of this edit in October 2024, it's available to stream for free on the PBS app.