Qt Quick 2.0 SoundEffect on BB PlayBook: using null output device, none available

Audio item works fine (however, the sound freezes when I trying to change the volume and it prevents normal loop the song: there is a slight delay), and SoundEffect doesn't work at all:

Info: Sending request: Launch
Info: Action: Launch
Info: Launching com.example.TestApp.testDev__TestApp94ecc68c...
result::47419553
Info: done
QML debugging is enabled. Only use this in a safe environment.
Failed to open Locale pps, errno=2
QML Debugger: Waiting for connection on port 3768...
Module 'Box2D' does not contain a module identifier directive - it cannot be protected from external registrations.
QQNXLocaleData: Failed to create socket notifier, locale updates may not work.
using null output device, none available
Number of leaked pixmaps: 2