WRR 101.1 plays Symphony #9 by Ludwig van Beethoven before flipping to Christmas music after Thanksgiving until January 1.

The stations were network affiliates of the Mutual Broadcasting System and carried its schedule of comedies, dramas, news and sports during the "Golden Age of Radio".

As network programming shifted to television, WRR-FM began airing classical music full time, while the AM station concentrated on news, talk and information.

[10] As part of its municipal ownership, WRR began broadcasting Dallas City Council meetings in 1978.

In later years, however, Portable People Meter (PPM) evidence showed that the meetings, which interrupted the classical format, caused a significant drop in the station's ratings.

[12] The statement said the city government believes steps are needed "to ensure it remains a City-owned classical music format radio station".

With the introduction of land-based U.S. radio station licensing in late 1912, it had been the practice to assign call signs starting with "K" in the west and "W" in the east.

The original boundary line was located along the Texas-New Mexico border, and it wasn't until the shift in early 1923 to the Mississippi River that new stations going on the air in Texas received K instead of W call signs.

After the AM station was sold and its callsign changed to KAAM, WRR-FM dropped the no longer required "-FM" suffix from its call sign, effective May 15, 1978.