UMO 4000 . . . at some point in 1974 UA repacked the first 2 volumes of the Many Sides of Rock ’n’ Roll and put them in a box with a booklet that reproduced the notes from inside the gatefold sleeves. The one significant difference was that these four discs are all in MONO . . . all three volumes and the four single disc sets were all ‘electronically enhanced to simulate a stereo effect.’ The mono purists were out there pushing their agenda . . . and Alan Warner and UA were now working their side of the road.