During late 1990 , Greg McPherson stopped touring with the band .
`` Mark Wahlberg 's album scored a number one hit with `` '' Good Vibrations '' '' , and a platinum album.===1992 : Lip synching allegations and popularity decline===By late 1990 , Keyboardist Greg McPherson was no longer part of the touring force as bassist David Dyson then assumed the role of musical director . ''