I have composed a virtual audio driver for Windows 10 based on the
WaveCyclic sample. I have an app that opens the device endpoint's loopback
interface to monitor sound played by other apps into the device. I have
removed the volume and mute nodes from the sample's topology with the
expectation that Windows would manage those functions for me, but it turns
out to manage only volume. If I mute the master control at the Windows
sound control window, then my monitoring app receives unattenuated sound.
How can I get mute to work on the loopback?
Fwiw, when I replace the mute node in the driver's topology, I don't see
its handler called when I mute from sndvol.
Thank you for any advice you may have.