But I was thinking, "Well, that's kind of a waste of a good tuning peg," so I took a bass string, put it on the guitar, and tuned it in unison, only an octave lower on the A string, so I'd still ...

In 1975 session bass player Anthony Jackson commissioned luthier Carl Thompson to make him a 6-string bass with a low B and a high C, which he called the Contrabass. Earlier in the 70s Emmett Chapman ...