As an avid listener to radio, I can report that linear audio advertisements are incredible friction for me.
Stations licensed as “Non-Commercial Educational” (NCE) stations in the US can’t run commercials, but they can run underwriting acknowledgments, which is basically the on-air “thank you” to business donors connected with a message that contains no promotional language.
As much as I hate to admit it, linear audio underwriting announcements are also friction to me (although much less than outright commercials). Visual, though? I don’t see that as friction.
Radio, in 100% of new cars, has a visual element.
I feel that some NCE radio stations can reduce, and maybe even in some cases, eliminate, these points of audio friction with visual text messages acknowledging underwriters. And heck, images too. I’m talking about doing it through RDS (sometimes called RBDS) and HD Radio text.
According to 47 CFR 73.503(d), “No promotional announcement on behalf of for profit entities shall be broadcast at any time in exchange for the receipt, in whole or in part, of consideration to the licensee, its principals, or employees. However, acknowledgements of contributions can be made. The scheduling of any announcements and acknowledgements may not interrupt regular programming…”
It’s clear that text messages on NCE radio must be non-promotional and follow the same content rules as the linear audio. The phrase that catches my eye and makes me nervous is this one: "announcements and acknowledgements may not interrupt regular programming.”
In a 1981 report, Congress stated that interruptions must be "at the beginning and end of programs,… between identifiable segments of a longer program" or during "station breaks" where programming was "not unduly disrupted." The FCC officially adopted this definition the following year.
For argument’s sake, NCE-TV stations have the same limitation. And it’s clear that an NCE-TV station can’t run an underwriting acknowledgement in a picture-in-picture as Antiques Roadshow runs (outside of a break). So, wouldn’t an NCE radio station be prohibited from running a visual acknowledgement during programming?
At face value, without added context, it’s a grey area at best. But let’s look at historical definitions. (They go back many, many decades, before RDS and HD Radio).
"Interrupting regular programming" means stopping, suspending, or unduly disrupting the normal broadcast. RDS, according to 47 CFR 73.295(a), is not an SCA, so it’s a broadcast service which enhances the main program broadcast service. HD metadata is embedded in the broadcast signal along with audio. So this makes it seem like the same standards as TV may apply: no visual acknowledgements during the program.
47 CFR § 73.310(a) defines an “FM broadcast station” as “a station employing frequency modulation in the FM broadcast band and licensed primarily for the transmission of *radiotelephone emissions* intended to be received by the general public.”
I think that’s the key! “Radiotelephone emissions” means *audio-only*!!
This makes radio text *only* a parallel stream. While there is zero mention of visual displays, data streams, or text, it appears that the stream that cannot be interrupted is the audio stream.
So I think visual acknowledgements via RDS or HD Radio text/images are legit, even if it occurs during programming, and has the potential to make NCE radio even better!
[I’m not a lawyer, just a questionable radio metadata freak]
I'm really into radio station metadata. Unfortunately, it's not well-documented how that data and its accompanying images are actually delivered from vehicle to vehicle in the USA.
In my Toyota Tacoma, image delivery is handled by Gracenote. That is, until HD Radio steps in and takes over. According to Quu’s 2026 industry report, HD Radio is installed in 74% of vehicles. [See note 1]
But when listening to analog radio, car radios rely on backend metadata platforms to fill in the visual gaps.
Here is the breakdown of the delivery systems powering AM and FM receivers in 2026 models, as far as I can gather from the newest sources I can find:
1. Gracenote (47.5% of vehicles)
Gracenote provides audio metadata and smart radio solutions to nearly half the market. [See note 2]
2. DTS Autostage (23% of vehicles)
DTS Autostage delivers hybrid radio and metadata services to nearly a quarter of modern vehicles. [See note 1]
3. RadioDNS (2.5% of vehicles)
RadioDNS is primarily utilized by Volkswagen and Porsche through their integration with Radioplayer. [See note 3]
I should note that, to the best of my knowledge, every vehicle that has DTS Autostage also has HDRadio.
If you tune into the smart speaker “radio waves” late at night with the right keywords, you might just stumble across my most popular station: Ambient.FM.
As of June 2026, it’s gathered a steady, dedicated late-night listener base. But the story of how it came to be isn't very calculated. It’s a story about frustration, aimlessly clicking around my DAW, and a eureka moment.
Here’s how Ambient.FM was born.
Just before the pandemic hit, I was saving up money to pursue my ultimate dream of launching a terrestrial FM radio station (a dream that, I’m happy to say, has since come true). While saving, I started building demo "formats" to figure out the programming, focusing on music libraries where I owned the rights.
One of these formats was a "chillout" station, similar to “Lo-Fi Girl” or the downtempo streams you see on YouTube. Due to the extra time I had during the pandemic, I spent several months producing about 100 original tracks. I threw them onto an unadvertised Shoutcast stream just to test the waters.
It sounded great, but there was a glaring issue: 100 tracks turn over incredibly fast.
I quickly realized that preventing listener burnout would require doubling my library, which meant months of additional, exhausting work. Actually, wayyyyy more than double. It simply wasn't a sustainable goal.
One day, I opened up my DAW (Digital Audio Workstation), stared at the files, and felt completely stuck. I started clicking around, messing with settings without any real goal in mind. Then, I did something low-tech and kind of weird (because I love low-tech and weird): I went to the master tempo setting and dropped the track in front of me from 117 BPM down to 16 BPM.
Yes. Sixteen.
It was absolute magic. By slowing the tempo down to a crawl, I had accidentally turned my (relatively) upbeat electronica chill tracks into deep, sweeping ambient music.
They were slow, atmospheric, and incredibly relaxing. Aside from having to swap out a few drum samples, the tracks translated beautifully.
With my new ambient sound discovered, I had to figure out how to format it. Originally, my chill tracks were about 5 to 6 minutes long. I took the new, slowed-down ambient versions and meticulously stretched them out to exactly 19 minutes (which made them all different tempos).
Why 19 minutes? It all comes down to the "radio clock”. Playing three 19-minute tracks back-to-back fills exactly 57 minutes. This leaves a perfect 3-minute window every hour for station IDs and other essential "radio stuff”, if I ever needed it.
I discarded a handful of the tracks that didn't survive the tempo drop, replaced them with some fresh productions, and ended up with a library of about a hundred 19-minute ambient tracks. Because the music is so slow, your brain doesn't latch onto a melodic "hook" the way it does with normal-speed songs. The result is a playlist that doesn't burn out listeners. It’s hard to remember a track you heard a few days ago. At least it is for me. And I produced the tracks. Hahah.
Ambient.FM has been running for a few years now. It grows entirely on organic traffic, partially because I scored a great deal on the parked "ambient.fm" domain, which catches people asking their smart speakers to play "ambient radio” or “ambient fm”, etc.
But the thing I am most proud of is this: The station is 100% human-made music.
There is zero AI generation involved. I’ve done other projects where I experimented with AI as a music production tool, and honestly, it’s not a space I feel comfortable in. Ambient.FM’s music quality might not be on the level as the many highly talented critically acclaimed ambient artists, but it was crafted by a human being, and I am incredibly proud of that.
Recently, I decided to run a metadata experiment with my small terrestrial FM station. Using RadioDNS, I made one of the programming links point directly to the Ambient.FM stream.
According to my backend hit counter, a few people have actually found the Ambient.FM stream straight through their FM radios. As a radio geek, seeing that happen is pretty neat.
For now, Ambient.FM is going strong online. But I can't help but think: maybe someday it will graduate from an internet stream to a full, dedicated FM signal somewhere, or carve out a cozy spot as a fun HD Radio side channel. Until, and if, that day comes, the broadcast continues online. If you ever need to slow things down and unwind, ask your smart speaker to "Play Ambient.FM”. I'll probably be listening with you!
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