For the cost of the game, you could buy a 1TB hard drive and install it fairly easily.Yes, I realize some people's budgets are constrained, but it's not like this information hasn't been out for a couple weeks now
This is an application we're talking about here. Unless the install process is incredibly robust, it's going to install the audio files with the rest of the system files for the game. If you're relying on an SSD for system files, the 40GB of uncompressed audio are going there whether you like it or not. Until 512GB and 1TB SSD's are affordable, this game size is outright absurd.
At least other games like Skyrim and Crysis let you choose if you want the game to have a particularly large footprint by breaking out things like high texture packs into separate optional files. Even then, you're still talking around 15-20GB vs 50GB.
As someone mentioned before-hand, you could use Junctions in Windows to relocate the files, but on an unrelated note -
Why the obsession to install the game on only an SSD? I don't see too many builds on here that have an SSD as their only HD storage option. The only time an SSD would really benefit you in Titanfall is if you joined a match that's already in progress to reduce load time. But in fresh matches, it waits till all the players have connected. 500GB+ Hard drives are more than affordable.
For those who have bandwidth caps, I can certainly understand and feel their pain. For the average user, it's not hard to get more space/clean up space for a game if it's one you really want to play.
I do agree it's silly to not have varying levels of install to reduce file size, but, I do think the notion that people are acting like nobody will be able to fit this on their HDD with everything else is rather ridiculous as well.