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For my application, I need to visualize the audio signal that's sent to an audio interface (core audio/hardware sound card), without needing to forward the signal (this is how soundflower or jack audio work).

One example is that QuickTime player allows the user to record whatever is playing at the moment. I need the same ability to capture audio but in my case I'll visualize the signal.

Is it possible to use QAudioProbe and QMediaObject to achieve this?

Thinium
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  • You need to capture all the sounds ***sent*** to a given sound card, without any media player started? – Vladimir Bershov Apr 06 '20 at 19:01
  • @VladimirBershov Yes! For example, if someone sent sounds from audacity directly to the soundcard, or if someone played music from the browser and sent it to the sound card, I would like to capture them. – Thinium Apr 06 '20 at 19:17
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    Unfortunately, this is most likely impossible without using additional virtual audio driver https://stackoverflow.com/q/44507956/4149835 – Vladimir Bershov Apr 06 '20 at 19:27

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