arun1969
in case of new parks mcclellan decimation filter coefficient. Wide Band FM RDS decoding doesn't work. When _parks mcclellan used, decimation filters become sharper and narrower — their transition band often starts around 45–50 kHz (for typical 192 kHz→96 kHz decimators). That’s perfectly fine for mono and stereo FM (0–53 kHz total baseband), but RDS lives at 57 kHz, so it gets attenuated 3–10 dB or phase-distorted before it even reaches