Pieces that involve the use of bass viola da gamba with another bowed bass instrument.

Ruhe- Sonata for viola da gamba and violoncello
Charpentier- Sonate in 8 parts, which feature the gamba and cello accompanying each other's solo
Buxtehude- Sonata for viola da gamba, violone, continuo. If 'violone' is to be taken in its Italian sense such as in Corelli, the instrument referred to would probably be a bass violin or cello. G violone in Germany, but either way, an 8 ft instrument.
Corelli transcriptions- by implication, the tenor clef in the basso may indicate cello.
Bach- Brandenburg 6

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