In 1973 he founded Spectrum , a quartet that included Eberhard Weber .
A self - taught guitarist , Kriegel began playing when he was fifteen and formed a trio three years later that won an award at a 1963 amateur jazz festival .
In 1973 Kriegel founded Spectrum , a quartet that included Eberhard Weber .
A self - taught guitarist , Kriegel began playing when he was fifteen and formed a trio three years later that won an award at a 1963 amateur jazz festival .