Oh wait really? I didn't think to actually check the game files so hey thanks for the tip!

Unfortunately I don't own some of the DLC so probably not, but if I get the new ones I'll be sure to do so.

Again, it's super easy to normalize the audio if you'd like to learn how to do it yourself. There's no weird file encryption and the music tracks are exposed in the game files. Just normalize them yourself where they sit in the game's directory, and you don't even need to make a mod.

Do you have any plans to update this further?

If the DLC added new music, then yes. Mechanicus was the last DLC I'd updated for.

To be honest if you want to do this yourself it's easy. Goldwave, Audacity, MP3Gain -- any of these will allow normalization. The tracks are exposed in \Data\Audio\Sounds\Streamed\Music and not in some pak or container file.

IIRC I used Goldwave to convert the game's .oggs to 192kbps @ 44100hz .mp3 (because the original encoding wasn't uniform), then used MP3Gain to normalize them to 89.0 peak dB, then simply converted the container format back to .ogg.

Guessing this is outdated given there's been more DLC and thus more music?

Thanks for this. The music was destroying my ears because it was so much louder than anything else even at 15%.

Brilliant. The kind of subtle mod that does more to improve a game than it seems.