  The acoustic peak in the CMB power spectrum is sensitive to causal processes
and cosmological parameters in the early universe up to the time of last
scattering. We provide limits on correlated spatial variations of the peak
height and peak position and interpret these as constraints on the spatial
variation of the cosmological parameters (baryon density, cold dark matter
density and cosmological constant as well as the amplitude and tilt of the
original fluctuations). We utilize recent work of Hansen, Banday and Gorski
(HBG) who have studied the spatial isotropy of the power spectrum as measured
by WMAP by performing the power spectrum analysis on smaller patches of the
sky. We find that there is no statistically significant correlated asymmetry of
the peak. HBG have also provided preliminary indications of a preferred
direction in the lower angular momentum range(~ 2-40) and we show how possible
explanations of this asymmetry are severely constrained by the data on the
acoustic peak. Finally we show a possible non-gaussian feature in the data,
associated with a difference in the northern and southern galactic hemispheres.
