Here Matthew discusses the challenges of simulating the directivity of musical instruments using a loudspeaker, and why one might want to do that. An instrument radiation pattern database was available from an existing project in Denmark, so this was employed as the basis for the simulations. He introduces how ambisonic techniques can be employed to create directional 'beams' from a compact loudspeaker array with 20 drivers — a sort of 'soundfield microphone in reverse' so to speak.
