There might be a few reasons why Yamaha haven't released any audio styles yet. It could be that they're waiting to release the T5 so that there'd be more of a demand for audio styles as opposed to those who just own a S950, especially if a lot of people are going to trade in their existing instrument for a T5.

It could also be that Yamaha realises that by releasing them singularly as per the premium styles would cost a lot so they'd rather do them in packs? I know I wouldn't pay £20 per style, no way.

Or maybe they've dropped the audio route altogether?

It might be none of the above!