We already have new tracks. In addition to a few new general cross-faction songs, each subfaction has 3 unique tracks of their own.

For example, in the game soundfiles (Steam -> Steamapps -> Common -> Sins -> Sound,) the track "Advent Loyalists - Fate of the Apostate" is the song we got a short clip of in the Rebellion teaser trailer (http://www.youtube.com/watch?v=gS-VS5WS1B4).

I believe the devs have said that in total there's over an hour of new music.

Here's a full list for anyone who doesn't want to dig through all the sound files trying to figure out which are new and which aren't:

Advent Loyalist - Fate of the Apostate / Advent Loyalist - In the Name of the Unity / Advent Loyalist - Inevitable Retribution

Advent Rebel - A New Call / Advent Rebel - Purity of Memory / Advent Rebel - Revelation and Regret

Defending the Colony

Invasion Fleet

Marauders

Rebellion Theme

TEC Loyalists - Peace Behind the Walls / TEC Loyalists - Strength in Seperation / TEC Loyalists - Watching the Borders

TEC Rebels - Keep the Lanes Open / TEC Rebels - To the Victor / TEC Rebels - Trade Wars

Vasari Loyalists - Into the Void / Vasari Loyalists - Unstoppable / Vasari Loyalists - Warning Shots

Vasari Rebels - Alliance is the Only Way / Vasari Rebels - Diplomatic Envoys / Vasari Rebels - History in the Making

Fairly certain that's all of them.

Great to know. I hadn't heard any in beta 1 and I was starting to disengage after about six hours of playing.   I'm definitely going to need something different this time around. Thanks for the advice and feedback so quickly.

The title soundtrack I know I heard but I don't think I heard any of the others. It seems like all of the rest of the music was the same. I'll play closer attention when I get back to playing again tomorrow since I have class tonight, thanks.