benjibutten/MicMixer ? reverse-engineered prompt

Build me a Windows app that acts like a smart microphone mixer for streaming and voice chat.

I want it to take my normal mic, an optional voice changer mic, and music, then route them into one virtual microphone that games and apps like Discord can use. It should let me hold a hotkey to switch voices, use push to talk for the final mix, and optionally let music keep playing even while voice is gated. I also want monitoring, basic volume controls, live input level indicators, and a simple built in setup flow that helps me choose devices and a virtual cable.

Please include a small music player too, with playlist and queue support, plus the ability to capture audio from another app or from YouTube links. Add a clean overlay that shows mic and music status and can also be used in OBS or other streaming software through a browser source. It should run in the tray, remember settings, and be easy to launch on Windows 10 and 11. If you need to check current docs for any audio or overlay libraries, look them up online.