Audio Sample rate query on iOS in Unity 4.3 and above

I am wondering if there have been any fixes made in Unity 4.3 onwards to the audio sample rate issue on iOS devices.

The issue I'm referring to is that audio playback on iOS devices has a sample rate of 24kHz. It seems that if you use a sample rate of 48kHz (for example), then it will be downsampled at some point before playback.

I have looked at the information on this issue from other users' questions but I am curious to know if this is being fixed in any beta releases, prior to Unity 5.0

Thanks for your time.