ate ▁and ▁play ful ▁while ▁the ▁m ood ▁varied ▁from ▁" d ream y " ▁to ▁sin ister . ▁However , ▁it ▁was ▁D ag mar ▁Kra use ' s ▁unusual ▁and ▁eer ie ▁high - p itch ed ▁voice ▁that ▁was ▁the ▁group ' s ▁most ▁arrest ing ▁feature . ▁Her ▁German - inf lect ed ▁vocals ▁r anged ▁from ▁a ▁sweet ▁mel od ious ▁cro on ▁to ▁the ▁" lo ve - it - or - h ate - it " ▁Arm aged don ▁style ▁typ ified ▁on ▁In ▁Pra ise ▁of ▁Learning . ▁ ▁M embers ▁Anthony ▁Moore ▁– ▁guitar , ▁key boards , ▁per cussion , ▁programming , ▁t ape ▁manip ulation , ▁to y ▁th erem in , ▁mel od ica , ▁harm onica , ▁vocals ▁Peter ▁B leg v ad ▁– ▁guitar , ▁bass ▁guitar , ▁sa x oph one , ▁clar inet , ▁per cussion , ▁harm onica , ▁vocals ▁D ag mar ▁Kra use ▁– ▁vocals , ▁piano , ▁per cussion , ▁harm onica ▁Note : ▁D ag mar ▁Kra use ▁was ▁cred ited ▁as ▁" D aggi " ▁on ▁S la pp ▁Happy ' s ▁first ▁album , ▁Sort ▁Of ▁( 1 9 7 2 ). ▁On ▁the ▁next ▁three ▁albums , ▁S la pp ▁Happy ▁( 1 9 7 4 ), ▁Des perate ▁Stra ights ▁( 1 9 7 5 ) ▁and ▁In ▁Pra ise ▁of ▁Learning ▁( 1 9 7 5 ), ▁she ▁was ▁cred ited ▁as ▁" D ag mar ".