Notes on the creation of the file:
Sweep-Beamformed-Ambix-3rd-order-Amplitude-equalized.wav

A sequence of 16 sweeps, 15s long +5s silence, ranging form 22 Hz to 22 kHz,
Exponential sweep with Novak's synchronisation.
The 16-channels sweep file was convolved with the 16x32 beamforming matrix
for the 32-speakers spherical array built by Lorenzo Chiesi.
The output is a 32-channels WAV file ready to be played on the loudspeaker.
The amplitude has been adjusted for each Ambisonics order, so that the max
peak is around -6 dB.
Here the gains which have been applied (and which should be removed after
The recording has been done):
Order 0: +24 dB
Order 1: +24 dB
Order 2: +12 dB
Order 3: 0 dB
Without these gains, the low orders had been signals of very small amplitude, 
resulting in poor S/N during room acoustical measurements.