Is there a way to export BRIR wav files for use with ffmpeg headphone filter?

Sample command:

ffmpeg -i input.mp3 -filter_complex 'amovie=/opt/brir/room_5_7.1_brir.wav[brir];[0:a][brir]headphone=map=FL|FR|FC|LFE|SL|SR|BL|BR:hrir=multich' -f pulse 'ffmpeg'

BTW, the brir wav file would require 16 channels in the order specified for the map option.