  There are now four low mass X-ray binaries with black holes which show twin
resonant-like HFQPOs. Similar QPOs might have been found in Sgr A*. I review
the power spectral density distributions of the three X-ray flares and the six
NIR flares published for Sgr A* so far, in order to look for more similarities
than just the frequencies between the microquasar black holes and Sgr A*. The
three X-ray flares of Sgr A* are re-analysed in an identical way and white
noise probabilities from their power density distributions are given for the
periods reported around 1100 s. Progress of the resonant theory using the
anomalous orbital velocity effect is summarized.
