Call it one of the worthiest legacies of 20th century music: overcoming the given vocabulary of a musical instrument. Consider the electric guitar and just how many creative souls have taken on and extended the known language of sound and technique. It seems quite remarkable that anyone can find still more to be done. But they do …. And moving beyond the conventional structure of the guitar – both physically and musically – has been a concern of Greg Malcolm’s music for nigh on 20 years.