title: WASAPI: Getting the actual wave format a device is initialized with
body: <p>I need to programmatically get a wave format (<code>WAVEFORMATEX</code> structure) of the initialized WASAPI rendering audio device. <code>IAudioClient::GetMixFormat</code> doesn't fit in this case, because <code>IAudioClient::Initialize</code> can be called with another format (not equal to the mix format).
  When the device is activated and initialized, what other methods of <code>IAudioClient</code> or <code>IAudioRenderClient</code> (or others?) can I call to programmatically get the <em><strong>actual</strong></em> wave format of it?</p>