I won't mince words:

This build MASSIVELY improves netplay.

I also fixed the volume options not working properly.

Here is a small amount of text:

• Addressed the issue of the game dropping frames after a rollback, which also greatly improves netplay responsiveness and reduces dropped inputs.
  [spoiler]It had nothing to do with rollbacks themselves being slow, and everything to do with me not knowing how to write frameskip code. :^P[/spoiler]
• Addressed how sounds are handled during rollbacks!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
  I'm not done! There are still occasional dropped sounds, but this is the lion's share of fixing the problem.
• Fixed the problem of weird hitches while playing a long set on Random stages, from the previous build.
• Fixed the music restarting when staying on the same stage if there was a rollback to frame zero. :^P
• Fixed the fact that some sounds didn't listen to your options volume settings. OOPS.
  

Linux and MacOS notes:

• Good: The sound code also got a big upgrade and is now using Ethan Lee's FAudio library!
• Not-as-good: Unfortunately, for platform support reasons 32bit support on MacOS is a thing of the past...so it is no longer possible for us to continue 32bit support for future Mac builds. :^(