The six Brandenburg Concertos BWV 1046-1051, prized jewels of the world's musical heritage, were written in 1721 during Bach’s appointment in Cöthen.
Of the six works, Bach originally wrote earlier versions of numbers 1 and 5 which differ not only with regard to articulation but also at times different tones, different rhythms, instrumentation and of course form.
These Urtext publications [BA 5201-BA 5206] taken from the New Bach Edition now give performers the possibility to play these earlier versions perhaps even alongside the version known today.
The Barenreiter Urtext study scores are a prime example of how Barenreiter takes a musical text and transfers it into a practical format.