The Psycheground Group

The Psycheground Group and The Underground Set: two groups to be mentioned together, as behind their names hid, for contractual reasons, the musicians from Nuova Idea. But without doubt the mastermind behind them was composer Gian Piero Reverberi, who was also the producer of Le Orme and wrote most of the tracks on these albums under the nickname Ninety.

Like Planetarium, Blue Phantom or Fourth Sensation these were Italian groups whose members were never listed on the covers.
The Underground Set were often thought to be an English group, their first album having been issued in many European countries. It's interesting to notice that the group has been mentioned as English in Vernon Joynson's "Tapestry of Delight" book.
But in an interview with Paolo Siani on the Italian Musikbox magazine, the drummer was one of the first to reveal that the musicians playing on this band's two albums were in fact Nuova Idea, as undefined (the label on which the first album and the singles appeared) was distributed by their label undefined at the time.