So, I'd like to display the spectrum of the audio that is transmitted through bluetooth. Both stereo channels separately, or overlaid on each other, so I could see the differences between the channels' level in different frequences. Preferrably on an android device, but windows 10 is also suitable.
I have seen a vst plugin by SIR Audio tools which displays the spectrum. And I could use it with a windows computer. But I couldn't figure out how to make windows capture the bluetooth audio. And I read that the A2DP sink function, that would help do that, is not supported on windows 10.