My app uses Audio Unit to play mp3 files in IOS, but when the screen off, the sound stopped -

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my app uses audiounit play mp3 files, totally used remoteio, newtimepitch, auconverter , multichannelmixer 4 audiounits.

my app play when screen locked, can not play while screen off!

even more strangely， issue happens in iphone4s(v6.1.3), works fine in iphone5(v6.1.4)!

here audio-unit setting code:

// connect audio unit: converter -> timepitch -> output osexcute( augraphconnectnodeinput(processinggraph, converternode, 0, timepitchnode, 0) ); osexcute( augraphconnectnodeinput(processinggraph, timepitchnode, 0, mixernode, 0) ); osexcute( augraphconnectnodeinput(processinggraph, mixernode, 0, eqnode, 0) ); osexcute( augraphconnectnodeinput(processinggraph, eqnode, 0, outputnode, 0) );  // try fix no sound issue, not work uint32 maximumframesperslice = 4096;     osexcute( audiounitsetproperty(mixerunit, kaudiounitproperty_maximumframesperslice, kaudiounitscope_global, 0, &maximumframesperslice, sizeof (maximumframesperslice)));

i have fixed issue. solution is: set kaudiounitproperty_maximumframesperslice 4096 every audiounit except remoteio unit.


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