What exact version of CC 2015 are you using? Is it 13.7.0?
The preview panel has a lot of options to it including the option to mute audio previews if playback isn't real time, but those options have changed quite a bit, so which version you're using matters.
The latest version. Also I have another question is there away to turn the little scroll bar for multiple Comp tabs back on?
Just because your CC app says it's up to date, doesn't mean it is. We've had a lot of people recently thinking they were on the latest version when they weren't. Please double-check for me.
Anyway, if you really are running 13.7, you should have the option I mentioned. You may need to expand your preview panel further to see all of the options.
Also I have another question is there away to turn the little scroll bar for multiple Comp tabs back on?
No, but you might be able to use your scroll wheel on your mouse or Wacom tablet to scroll between the tabs. My AE machine is not handy right now to check.
Okay thanks that helps yeah the preview panel has been updated. That kind of sucks for the scroll bar thing.
The scroll bar is gone but if you have third button on your mouse you can scroll between any of the panels in a panel group.