  HR 1217 is one of the best-studied rapidly oscillating Ap (roAp) stars, with
eight known oscillation modes that are distorted by a strong, global magnetic
field. We have reanalysed the multisite observations of HR 1217 taken in 1986
and 2000. We determined a weighting scheme for the 1986 and 2000 data to
minimize the noise level. A wavelet analysis of the data has found that the
modulation of the amplitude due to rotation for all frequencies is, in general,
consistent with the expected modulation for modified l=1, 2 or 3 modes.
Unexpected variations in the rotational modulation are also seen, with
variations in the modulation profile, time of maximal pulsation, and
pulsational energy in each mode. Interestingly, these changes take place on a
short timescale, of the order of days. We consider potential explanations for
these behaviours.
