Does my LG soundbar sound different for movies than for music, is that normal?

It's totally normal for a soundbar to sound different depending on what you're playing. Movies and music have very different audio characteristics: films usually have more emphasis on bass, spatial sound effects, and centered dialogue, while music is more balanced across the spectrum. Plus, many soundbars have preset sound modes (cinema, music, sports, etc.) that automatically adjust the equalizers, so it could be changing on its own depending on what it detects.

What you're probably noticing is that in movies there's way more dynamic range: loud explosions, background music, quiet dialogue, all mixed together. A soundbar is optimized to handle that, so it emphasizes certain frequencies. With music, especially if you listen to genres like pop or rock that already come well-balanced from production, the sound is more uniform. If the difference bothers you, try disabling those automatic modes in your LG's settings (check the audio settings) and leave a neutral equalizer for both, though you'll probably still notice something because it's the nature of the content itself.

One thing that also affects it is the source: if movies come through streaming or cable TV and music through Spotify or something like that, the compression codecs are completely different, so that influences a lot how the soundbar interprets it. Nothing you're describing indicates a problem, it's just how this kind of equipment works.

Don't make the mistake of thinking something's wrong with your soundbar if you notice that difference. I have a similar situation here at home: when I watch action series, the explosions and effects fill the whole room, but when I put on music or podcasts, the sound feels more concentrated in the center. It's because movie soundtracks use way more channels and spatial effects, while stereo music is more direct. If you want it to sound more consistent, some LG equipment has presets or equalizers you can adjust depending on the content.

What they don't mention is that sometimes the problem comes from how the soundbar is configured in your TV or player's audio menu, not just from the sources themselves. For example, a lot of LG soundbars have a "cinema" mode and a "music" mode that change the sound quite a bit, and if you don't know those presets exist you probably just left it on whatever came as default. Before you assume it's normal, check if there are equalization options or sound modes you can adjust manually, because sometimes a movie sounds weird just because it's using different audio compression or because the soundbar is boosting the bass too much.