Measured resolution of the 0x88890008 mystery: IsFormatSupported said the
capture accepts 2ch/48k shared while Initialize kept failing — because
the probe itself had switched to a MONO ask for frequency counting, and
this stack does not bridge channel counts on capture even under
autoconvert. Every unopenable-endpoint verdict after that switch was the
instrument, not the endpoint. Stereo ask restored; crossings counted on
channel 0.
enricobuehler
8c274d6256