Praeambulum primi toni a 5 (d-moll)

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Source: https://en.wikipedia.org/wiki/Matthias_Weckmann

Matthias Weckmann was a German musician and composer of the baroque period. His musical training took place in Dresden (as a chorister at the Saxon Court, under the direction of Heinrich Schütz), then in Hamburg where he worked with the famous organist Jacob Praetorius at the Petrikirche.

He was introduced to the Italian concertato, polychoral and monodic styles — because Schütz traveled to Italy as a young man — as well as the style of Sweelinck's pupils, some of whom had settled in Hamburg. Weckmann traveled to Denmark in 1637 with Schütz, became organist in Dresden at the Electoral Court of Saxony from 1638 to 1642, and returned to Denmark until 1647 (during the Thirty Years' War).

During a new (and his last) stay in Dresden from 1649 to 1655, he met Johann Jakob Froberger during a musical competition which had been organized by the Elector. They remained friends. In 1655, after a competition, he was named titular organist at the Jakobikirche in Hamburg, and spent his remaining life there. He founded a renowned orchestral ensemble, the so-called Collegium Musicum in Hamburg. This was the most productive period of his life: his compositions of this time include a collection of 1663, which set sacred texts mentioning the terrible plague which killed his first wife and many of his colleagues in Hamburg that year, including Heinrich Scheidemann.

He died in Hamburg and was buried in a family grave in the Jacobikirche beneath the organ.
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I played from a different edition compared to the edition I show in the video. I couldn't share that edition in the video, due to copyright. There are some very small differences, which I'm sure you will notice.