title: USB audio For Android Platform
body: <p>I am using Android 4.2.2 on Qualcomm APQ8064 Chip set. I want to enable audio output to the USB headset. I tried using aplay command but no luck. The driver for usb-audio is already there in the code. Everything is integrated but i don't get any output on the usb-headset. Any flags that need to be set?? Any lead will be of great help.</p>
  
  <p>@Micheal:Following are the logs for the same, I just noticed that below logs from AudioUsbALSA can also be seen when the USB headset is not connected.</p>
  
  <pre><code>3502:I/InputReader(  676): Device added: id=8, name='Logitech Inc. Logitech USB Headset H340', sources=0x00000501
  3504:D/StatusBar.NetworkController(  769): refreshViews: Data not connected!! Set no data type icon / Roaming
  3505:D/StatusBar.NetworkController(  769): refreshViews connected={ } level=?? combinedSignalIconId=0x7f02013d/com.android.systemui:drawable/stat_sys_signal_null combinedActivityIconId=0x0 mobileLabel=No Internet connection wifiLabel= emergencyOnly=false combinedLabel=No Internet connection mAirplaneMode=false mDataActivity=0 mPhoneSignalIconId=0x7f02013d mQSPhoneSignalIconId=0x7f020073 mDataDirectionIconId=0x0 mDataSignalIconId=0x7f02013d mDataTypeIconId=0x0 mQSDataTypeIconId=0x0 mNoSimIconId=0x0 mWifiIconId=0x0 mQSWifiIconId=0x0 mBluetoothTetherIconId=0x1080563
  3600:V/PhoneStatusBar(  769): setLightsOn(true)
  3627:V/AudioHardwareALSA(  272): closeUsbPlaybackIfNothingActive, musbPlaybackState: 0
  3628:D/AudioUsbALSA(  272): exitPlaybackThread, mproxypfdPlayback: -1
  3629:D/AudioUsbALSA(  272): closeDevice handle 0x0
  3630:D/AudioUsbALSA(  272): closeDevice handle 0x0
  3710:V/PhoneStatusBar(  769): setLightsOn(true)
  3730:V/AudioHardwareALSA(  272): closeUsbPlaybackIfNothingActive, musbPlaybackState: 0
  3731:D/AudioUsbALSA(  272): exitPlaybackThread, mproxypfdPlayback: -1
  3732:D/AudioUsbALSA(  272): closeDevice handle 0x0
  3733:D/AudioUsbALSA(  272): closeDevice handle 0x0
  </code></pre>