WebAudio API background operation on Safari iOS 7

Hello,

I would like to generate sounds in HTML5 and to be able to play them on
background operation, I mean when the screen is off.

Right now I am able to generate sounds using ScriptProcessor of webAudio
API and play them correctly on Safari/Chrome for iOS 7.

The problem is that when I turn the screen off, when using Safari, the
sounds are stopped and the sound reproduction is started again when I turn
the screen on. This problem does not happen in Chrome, I can listen to them
even with the screen off.

Is there something I can do to support this feature in Safari?
Thank you!

-- 
Leonardo.