In the verge of several digital modes, digital voice etc., the audio routing can become a nightmare, like "which interface should I choose for this audio stream?" or - How do I do FT-8 without listening to the whistles while listening to music? Or how do my Youtube or computer sounds does not end in my transmitted signals? Needless to say different requirements for different software and different modes. Things can get especially complicated if you are using Digital Voice, like FreeDV, with a multitude of inputs and outputs: Radio in, Radio out, Voice in, Voice out VoiceMeeter Banana is a powerful and free (for personal use) software, which you could compare to a very powerful mixer - At the control of your hands in the computer. It also provide a Macro Button program, that can easily be configured to send CAT commands to your PC, bind and unbind channels, increase volume, mute strips. The project is documented at https://github.com/rfrht/Voicemeeter-FT-991A and the detailed software configuration, including how to configure amateur radio software at the Wiki at https://github.com/rfrht/Voicemeeter-FT-991A/wiki 73s de PY2RAF.