Opening of Audeum Museum

Does anyone know what the source is on Frank Sinatra? Is it from the three channel tape recordings played back through a three channel tape player?

It was my dream to get three channel tapes and play them through three channel tape machines. The closest we got is the 3ch sacd's you can play back through multi channel dacs.

For those who have experienced it, 3 channel stereo is really great. However, playing 2ch stereo recordings through 3ch is a hit and miss. There are various solutions for that. You really need 3 channel recordings which are rare and nearly impossible to get to. It is a pity...