Unable to load plugins: qtaudio_windows.dll

[tlexy]

After I use windeployqt.exe to deploy my application, when I launch my application(platform:windows 10 x64), it didn't load the audio/qtaudio_windows.dll and audio/qtaudio_wasapi.dll, so my application doesn't work correctly, but application is ok, no crashed, no errors.! . It should be load the dlls under the folder "audio", but it doesn't。But in my another application(it very simple, just show the default audio input device name, the last application also has this functionity too, but larger), it will load the dlls under the folder "audio", so it works correctly。
I try use the qt.conf file to configure the application, but it seems doesn't work.
what should i do to make sure that application load all the dlls that application need?

[hskoglund]

Hi, you could try tracing the loading of plugins, to see what the problem is, open a CMD window and type

SET QT_DEBUG_PLUGINS=1

then launch your QtGuiApplication2.exe from the same CMD window.
To see the output of the trace, you need to download and start DebugView