ɪn nˈaɪntiːnhˈʌndɹɪd sˈɪksti ˈeɪt hiː tʃˈeɪndʒd tə bˈeɪs ɡɪtˈɑːɹ ænd wɪð dɹˈʌmɚ mˈæni nˈuːmaɪɚ fˈɔːɹmd ɡjˈʊɹɹuː ɡjˈʊɹɹuː æz pˈɑːɹt ʌvðə nˈuːli ɪmˈɜːdʒɪŋ sˌaɪkɪdˈɛlɪk ɹˈɑːk mjˈuːzɪk, ɹˈaɪɾɪŋ bˈoʊθ lˈɪɹɪks ænd mjˈuːzɪk fɔːɹ ðæt ɡɹˈuːp.
In 1968 he changed to bass guitar and with drummer Mani Neumeier formed Guru Guru as part of the newly emerging psychedelic rock music, writing both lyrics and music for that group.