came into use, and the 'standard' cello tuning (C2–G2–D3–A3) became the norm. As well, a solo repertoire for the 'cello started to appear, and the 'cello started to replace the G violone or A violone as the preferred bowed basso continuo instrument (see articles by Stephen Bonta for more detailed information). These advances for the 'cello were likely the first seeds of decline for the G violone/A violone. However, it was also this time period that saw the growth of instrumental ensembles, and the beginning of a taste for 'concerti' and 'symphonies.' For players and musical communities that had previously favoured G violoni/A violoni as their main bowed basses, once the cello took over the 8' role, the larger bodied G violini/A violoni could be used as 16′ doubling instruments, playing an octave below the cello-sized instruments. It is also from this time period (early 18th century) that most of the D violone tuning descriptions are documented. By this point, most of the other sized members of the viol family had died out (with the exception of the bass viol, which was cherished as a solo and chamber instrument). The largest members of the viol family (G and D violoni) were used in some regions even when other places had started to replace them with three- and four-string contrabasses/double basses. This may explain why the modern double bass to this day is so varied, and lacks a standard form, tuning or playing style. Professional bassists in orchestras have basses with flat backs, curved backs, sloping "shoulders" or rounded shoulders, and tunings including E1–A1–D2–G2 and less commonly "C1–G1–D2–A2. The modern double bass combines features of both the viol and violin families. Terminology When use of the word "violone" began in the early sixteenth century, "viola" simply meant a bowed, stringed instrument, and did not specify viol or violin. Historically "violone" has referred to any number of large fiddles, regardless of family. The term violone is sometimes used to refer to the modern double bass, but most often nowadays implies a period instrument. As a period instrument, it can refer to any of the different types that are described, above. "Violone" is also the name given to a non-imitative string-tone pipe organ stop, constructed of either metal or wood, and found in the pedal division at 16′ pitch (one octave below written pitch), or, more rarely, 32′ (2 octaves below written pitch).