I recall reading somewhere that tenor bass = A bass tuned an Octave higher ( E,A,D,G,) and the Piccolo is a bass tuned(A,D,G,C,)Which is a bit lower than the tenor bass. The Piccolo bass Would use reg. bass strings w/ the high C and minus the low E.I found that some guitar strings work well for the tenor set-up i.e. Guitar EADG Minus the B and high E strings. There is less string tension with reg. guitar strings when tuned as a tenor bass. Hope this helps