Can I play 16khz Audio with Playback()?

Hi,

the release notes say that G.722 playout and recording is possible now.
However it seems not to be possible, to use the Playback function with audio files that have a bigger rate than 8khz.

e.g.

exten => 123,1,Playback(audiofile)

wav files with 16.000 hz are not possible

Is there a possibility to playback 16khz audio?

Regards, Guido

any ideas ?