at its peak due to relative lack of content to fulfill Canadian content regulations. However, smooth jazz or some variant thereof has made a minor comeback in some markets, via AM stations (see below), FM HD Radio side channel/analog translator combos, or so-called "Franken-FM"s (actually low-power analog television stations on Channel 6 which serve a double function as radio stations due to the audio portion of the broadcast being audible on 87.75 MHz, possible because the FCC has not yet required low-power TV stations to convert to digital transmission). One such Such "Franken-FM" has popped up in Chicago (WLFM-LP, which has since changed format several times) and Anchorage, Alaska (with a more traditional jazz/blues flavor as KNIK-LP, using the call sign of a former smooth jazz station there which had flipped to adult contemporary). The format made a second comeback in Chicago in December 2014 via an FM HD side channel/analog translator combo. Similar FM HD side channel/analog translator combos also briefly allowed the format to return to the airwaves in markets such as Detroit, Orlando, Florida, and Honolulu, Hawaii; all of these have since changed format. In January 2012, in a rare case, a former smooth jazz station actually returned to its former format after the replacement format had failed. WNWV/107.3 in Cleveland had dropped its long-running "Wave" smooth-jazz format in favor of adult alternative after Christmas of 2009, under the ownership of Elyria-Lorain Broadcasting. On January 4, 2012, new owners Rubber City Radio Group restored the "Wave" format to the analog radio dial in Cleveland as a Smooth AC outlet, after a period of stunting with Christmas music. In 2013 the station evolved back into smooth jazz, although the word "jazz" was not included in the station's imaging. The format changed once again, albeit rather abruptly, at the start of 2020. Reasons The decline in popularity of the smooth jazz format has been blamed on a variety of factors, including lack of exposing compelling new music, over-reliance on instrumental cover versions of pop songs similar to the mostly-defunct Beautiful Music format, and Arbitron's PPM reports showing lower ratings returns for smooth jazz stations than the traditional diary system had. Lack of revenue and the genre not being viable during the current economic crisis have also been cited as reasons. Many purists of the format also feel that the smooth jazz interpretation has strayed too far from its roots