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Access to PC audio input stream

I would like to have access to the computer audio input stream that is connected to the radio. I would like to constantly read the incoming frequencies. I don’t know where to start. Any help on the underwater surface is much appreciated. How can I access the hardware of computers, for example, in C # or C ++? Is there any language that offers an API for this purpose? I know programming in C, C ++, Java, and C #, but if there is any other language that makes it easier to execute, it is preferable.

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I found a JUCE library for this purpose . It is very cross-platform C ++ and allows you to easily receive a stream in real time from all sides of audio devices with minimal fuss. The download contains a demo application with a sound demo. You can copy this code to give you a starting point.

The library is free to use in open source software, and it has a very modest commercial license.

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