  We quantize the moduli space of regular D1-D5 microstates, directly from Type
IIB SUGRA. The moduli space is parametrized by a smooth closed
non-selfintersecting curve in four dimensions, and we derive that the
components of the curve satisfy chiral boson commutation relations, with the
correct value of the effective Planck constant previously conjectured using
U-duality. We use the Crnkovic-Witten-Zuckerman covariant quantization method,
previously used to quantize the `bubbling AdS' geometries, combined with a
certain new `consistency condition' which allows us to reduce the computation
to quantizing perturbations around the plane wave.
