A while back I acquired three six-disc compilation albums given away by Zenith dealers when you purchased a new stereo: Zenith Presents Encore, Encore '71 and Encore '72. These were pressed by Capitol Records and contain a couple of well-known hits; the other 95% is popular songs covered by persons not known for said song. For example, Both Sides Now by The Brothers Four, or A Boy Named Sue by Flatt & Scruggs. Even better are the fictitious bands like "Fiesta Brass" and "The Sounds of Our Times."
