KCSN, the radio station of Cal State Northridge, launched its new 24/7 format of modern Latin/Latino music with a live in-studio broadcast by Los Lobos. (Kirk McKoy / Los Angeles Times)

Listeners tuning in to KCSN's new HD2 radio station will notice something once unheard of but increasingly common in American culture: Spanish and English being spoken — and sung — together, almost interchangeably.

One day recently, for example, the Cal State Northridge public radio station played "Hypnotized," an erotically chill trip-hop track by the British band Morcheeba, sung in English, with Chile's Ana Tijoux adding a Spanish-language rap.

A quarter-hour later, KCSN fired up "Cinco Minutos Con Vos" (Five Minutes With You), an elegiac dub/neo-soul tune by Elvis Costello and the Roots, performed mainly in English but with a haunting Spanish-language guest vocal by Marisoul of the red-hot L.A. band La Santa Cecilia, a 2014 Grammy nominee.

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On all but a handful of radio stations, as in the vast majority of network television shows and Hollywood movies, English and Spanish are still strictly segregated. But by launching its new "Latin alternative" music format, KCSN seeks to blur that barrier and cater to young U.S. Latinos, as well as a growing number of non-Latinos, who regularly consume pop culture in two or more idioms.

The public, nonprofit station bills itself as the country's first English-language radio channel to play progressive Latin music around the clock. CSUN officials believe the big question isn't so much whether their format will succeed, but why no one had tried it before. The new station launched Nov. 8 with a live in-studio performance by Los Lobos, the paragon of bilingual alt-rock bands.

"I find it uncanny," says Sky Daniels, the public radio station's up-tempo general manager. "No one in this market serves any modern Latin musical tastes. I mean, you have norteña formats, you have pop formats. But you don't have a 24-7."

KCSN's new radio station resembles other recent initiatives by U.S. media outlets to attract 18- to 34-year-old Latinos by programming Latin-centric content that's spoken in English, Spanish or, in some cases, a free-flowing combination of both. Fox News Latino, ESPN Deportes and the just-launched Fusion entertainment and news cable network, a joint venture of Disney/ABC television network and Univision Communications Inc., all are attempting to reach young, assimilated Latinos, a demographic much-coveted by advertisers.

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By adopting HD technology, KCSN hopes to match its content with a delivery system that will allow it to reach that demographic more easily.

HD Radio is a digital broadcast that's "embedded" into the analog AM or FM radio signal, creating a static-free sound similar to that of satellite radio. HD channels reside on the dial just a fraction above or below their AM and FM analog siblings.

According to iBiquity Digital Corp., the Maryland-based company that holds the HD Radio trademark, 28 automobile brands, comprising 148 different models, currently offer HD radio technology or have announced that they will.

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More than 2,100 U.S. radio stations are equipped with HD Radio technology, including Pasadena-based KROQ (106.7 FM). Last year, the music news website the Top reported that iBiquity has developed working prototypes of HD-equipped mobile phones.

Marketing research repeatedly has shown that young Latinos, one of the country's fastest-growing demographics, have tended to bypass laptops in favor of accessing the Web on less-expensive mobile devices.

"There's 40,000 kids that go here — they never look up," Daniels says, referring to CSUN's student population, which is 40% Latino. "They have their smartphone, they have either their earphones or headphones. And they're navigating without looking up, and they're listening to mobile entertainment."

Daniels says it's still too early for KCSN to commission a survey to see how the new format is faring.

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"Latin alternative" is a slippery term that encompasses several genres, including Latin alternative rock, electronic dance music, indie pop, rock en Español and fusions of salsa, soul, funk and Caribbean dance rhythms. A number of L.A. radio stations occasionally play some, or all, of these genres, but mostly on one- or two-hour weekly programs. Meanwhile, Southern California's Spanish-language programming is dominated by talk radio, commercial pop and rock, and traditional regional music such as ranchera and norteña.

CSUN officials are backing the new HD2 station (which also live-streams at http://www.LatinAlt.org) for a number of reasons, including the school's large Mexican American and Central American student population.