It popped up in a Indie Game Audio Podcast I listened to today. They claimed to have used this format to compensate for not having access to middleware like Wwise or FMod, and implemented their “interactive” soundtrack by just using simple level automation on a 32 channel RF64 file with all background music synced up. Sounds nifty, right?
This file format isn’t that new. The EBU Specs date back to 2009. Well, weirdly enough, I haven’t heard of it as of today, even though I work in the broadcast business.
So, how do you actually create such a file? It turns out that Audacity does the job (I have yet to check if other DAWs offer RF64 support).
In order to make this work you have to open the Audacity preferences Dialog and make sure to enable “Use custom mix” in the export settings otherwise everything will be mixed down to stereo.
Then setup your session with multiple tracks and when you export the audio select “other uncompressed files” and “RF64″.
Then you are prompted with the mixing matrix where you can specify the channel you want to route each track to.
It certainly seems this could be a nifty, certainly not super comfortable, but still viable workaround in case you don’t have access to Wwise or FMod and the like.