Mazda 3 Sedan 2019 Owner's Manual page 52

Entertainment
Entertainment
Multicast channel selection
If multi-cast channels are available for an HD Radio broadcast currently being received, the
multi-cast channel list is displayed.
Select the desired radio station.
NOTE
If an analog broadcast is received once and HD Radio is received while HD1 is selected,

the audio unit switches to the HD Radio station automatically.
When the icon is illuminated, there could be a noticeable difference in sound

quality and volume when a change from digital to analog signals occurs.
If the sound quality and volume become noticeably diminished or cut off, uncheck the
"HD Radio Tuner" in the "FM Settings", to turn the HD radio off.
Once an analog broadcast is received when HD1 is selected from the Favorite channels, it

is switched to HD Radio automatically.
If the radio reception conditions are poor, or HD is off, switching to HD Radio broadcasts
is not possible.
When an HD specialty channel (HD2 to HD8) is selected from the Favorite channels,

"Signal Lost" is displayed and no audio is output until HD Radio is received.
If the radio reception conditions are poor, "Signal Lost" continues to be displayed.
If the icon is not illuminated, information such as song titles of the HD Radio

station are received, however, the audio output is analog.
4-14