Although it's probably not what you're hearing, the audio level of our classical station here seems low once the digital fades in. That's because the dynamic range of digital is much greater than analog FM and this station uses all of it.
Other stations have lower levels on their digital channels for the same basic reason. They've decided not to play the "loudness war" on their digital stations and let them have audio levels like you would hear on a CD. There is an option to make the digital audio sound exactly like the overcompressed FM stations and a few stations have decided that's best for them which eliminates one of the advantages of digital audio.
Other stations have lower levels on their digital channels for the same basic reason. They've decided not to play the "loudness war" on their digital stations and let them have audio levels like you would hear on a CD. There is an option to make the digital audio sound exactly like the overcompressed FM stations and a few stations have decided that's best for them which eliminates one of the advantages of digital audio.