  We describe a hadron physics program attainable with a partially instrumented
CERN COMPASS spectrometer, involving tracking detectors and moderate-size
ECAL2/HCAL2 calorimeters. COMPASS can realize a state-of-the-art hadron beam
physics program based on hadron polarizability, hybrid mesons, chiral anomaly,
and meson radiative transition studies. We review here the physics motivation
for this hadron beam program. We describe the beam, detector, trigger
requirements, and hardware/software requirements for this program. The triggers
for all this physics can be implemented for simultaneous data taking. The
program is based on using a hadron beam (positive/negative pion, kaon, proton)
in COMPASS.
