How should I listen to Suzanne Ciani "LIVE Quadrophonic"?

I just received "LIVE Quadrophonic" as a gift from my partner (number 139 of 227!).  This incredible piece, which was made possible by the Buchla 227 quad output module, includes a custom quadrophonic hardware decoder that allows you to use a conventional turntable.  According to the instructions, you plug the conventional two-channel turntable into your pre-amp, plug your pre-amp into the decoder, and plug the decoder into your quadrophonic audio receiver.

Here's the problem: I don't have a quadrophonic audio receiver.  Go figure.  Here's what I do have:

Turntable: Edwards Audio Apprentice TT1 mk2
Pre-Amp:  Turntable Lab: Rolls VP 29.TTL
Audio Receiever: Denon S900W with five speakers, though the center channel is really only good for dialogue so I unplug when listening to music and will unplug when listening to this quadraphonic record.  No sub-woofer.

Another forum (https://www.quadraphonicquad.com/forums/index.php?threads/analog-discrete-to-hdmi.24175/) recommends using a Creative DTS-610 to convert the four audio signals to digital, then pass it to the receiver in 5.1 via HDMI or Optical.

What do you think?  Am I understanding this correctly?  Will this work such that I get a quadrophonic experience?  I really don't want to listen to this in mutli-channel stereo....I want to experience it as it was intended!