with the rock-oriented direction of the band." He also wanted to experiment with the solid-body electric double bass that he had started playing. He was an early proponent of the instrument, adding a fifth string, which he has played regularly since the early 1970s.

From the early 1960s to the early 1970s, Weber's closest musical association was with pianist Wolfgang Dauner. Their many mutual projects were diverse, from mainstream jazz to jazz-rock