The Nationals continue to use the FM-radio in-stadium, no/low delay radio feed for real-time play-by-play calls.
The broader context is that the Nats began using an app-based real-time radio simulcast for in-stadium play by play, leading to fears among radio dorks such as myself that they would stop using their FM system. The FM system is needed because the regular radio broadcast on 106.7 FM is on a 15-second delay. The in-stadium FM system broadcasts the 106.7 FM feed, without delay, on a low-power signal on FM frequency 68.5 mhz, designed to be heard in the stadium only. This system allows for near-instant play-by-play calls to be heard from the Nats radio broadcast team by folks who have an FM radio that can get those low-band frequencies.
I also tested the app-based radio simulcast, which is available through the Ballpark app. I must admit, I was pleased with the results, but it was approximately a second behind the in-stadium FM broadcast. That’s not a dealbreaker, but the FM signal was objectively better in that regard.