NO... from what I have read so far, the audio loop STYLES are Yamaha proprietary format.

However, you can add audio loops in .WAV format via USB stick as Multipads. But these can't really be used as full style drums, not being able to have fills and Variations functioning like normal styles.

As of yet, there is also no information about how long it takes to load the 64MB of Flash memory, where the audio loop styles are stored. So, if you need to load in extra styles (once Yamaha make and market them), no information is yet available (AFAIK) as too whether this is practical on a gig or not.

There's a lot of information that is so far missing as to how practical this new feature is.