First of all, there is no need to use Reaper at all.
Reaper is complex to use, and it is very easy to mess up everything!
Audacity can be used for playing back the sweep and simultaneously recording your 19 channels from the Zylia microphone array. Just remember to mute the track containing InvSweep while playing and recording...
After doing the recording (which must last some seconds after the end of the sweep), select all, then invoke the Aurora Convolution plugin.
Place the recorded signals in Audio Data, place the Inverse Sweep in Filters, and perform the convolution.
You will get a set of 19 new tracks, each of them containing one channel of the impulse response, with a lot of silence before. If you want, you can select and cut away (or delete) the leading silence, for exactly the same length as the sweep (say, 10 seconds). I usually also cut away the silence AFTER the IR has faded to zero.
Now it is time to convert from A-format (19 channels) to B-format (16-channels, Ambix 3rd order).
You need the 19x16 FIR filter matrix which you can download from my web site, here:
http://www.angelofarina.it/Public/Xvolver/...Zylia-Jul-2020/If your microphone is the new model, you need to downloa0d the WAV file named A2B-Zylia-3E-Jul2020.wav
After importing also this in Audacity, you again select all and invoke the Aurora Convolver plugin.
You drag the 19 impulse response channels to Audio Data, the 16 channels of the FIR filter matrix to Filters, select the flag for "matrix mode" convolution and perform the matrix convolution.
You will get 16 new channels, each containing one of the Ambix channels.
You select these 16 tracks and export them in a single WAV multichannel file. Of course, you must enable the multichannel export capability of Audacity (by default it downmixes everything to 2-channels stereo).
