A Moment of Bach Alex & Christian Guebert

In four notes, Bach reframes our idea about what is possible in common practice harmony.  This is one of the weirdest moments of Bach, coming from one of the weirdest openings to a hymn tune.   But as always, it makes sense in the context of the text.  It even makes sense harmonically, as we see when the hymn tune closes on four much more normal-sounding notes... and Bach repeats these, adding closure to the text "es ist genung" (it is enough).   This little repetition at the coda, even more than the wildly inventive opening, shows the genius of Bach, the subtle choices that make him enduringly great.
Netherlands Bach Society performs the closing chorale of O Ewigkeit, du Donnerwort (BWV 60) under the direction of Shunske Sato

A textbook "moment" of Bach -- in a charming setting of the three verses of the German song "O Lamb of God, Most Holy," suddenly near the end of the third verse Bach finally heeds the text and shows us the strange despair we are praying for mercy to avoid. He employs several musical devices in this sudden moment: a change in meter, a suggestion of a distant tonality, and a barrage of harsh chromaticism (notes outside of the key).
First we learn the background and the tune "O Lamm Gottes, unschuldig" before showing how Bach introduces this Cantus Firmus (melody) in this organ prelude's beginning and first verse where it is heard on top. The Cantus Firmus moves lower in the second verse, and in the third it is down at the bottom in the organist's pedalboard. Here the text of the last line changes from "have mercy on us" to "grant us peace." Ending strong and firm, Bach gives us peace from that sudden harsh "moment."
Netherlands Bach Society: "O Lamm Gottes, unschuldig" as played by Wolfgang Zerer for All of Bach
Thank you to listener David for the excellent suggestion. 

One of Bach's most famous works, and one of the greatest melodies of all time -- this comes to us by way of an almost impossibly good performance/recording by the Netherlands Bach Society.  By having the first violin part played by a section rather than a solo, they give Bach's wandering melody more purpose than it has in the famous version for solo violin, "Air on the G String", which is actually a re-arrangement of this original version -- and one which, we assert, does not stack up to the original version's greatness.  That greatness comes not only from getting the first violin part back in its proper higher register and key, but also from the interplay of the inner lines in the second violin and viola parts, as well as the famous walking bass line of the continuo part. 
Ultimately, though, it is that upper melody which enchants us most.  Is there any wonder that it has enchanted generations since Bach -- it seems to reach toward some meaning, something just out of grasp -- and will enchant generations to come? Yes, the melody wanders... but not all who wander are lost. 
See "Air" from Orchestral Suite No. 3 performed by the Netherlands Bach Society, conducted by Lars Ulrik Mortensen.
PATREON for A Moment of Bach - always optional, always appreciated.
Huge thanks as always to the Netherlands Bach Society for allowing us to use their audio examples on our podcast.
Thanks also to Syndey LaCom for our podcast artwork.

Did Bach write this? Many think not. It's brilliant nonetheless! 
We get into a talk about aspects of this motet which would or would not be hallmarks of Johann Sebastian.
BWV 230 as performed by the Netherlands Bach Society

This delightful jig closes out our miniseries on Brandenburg 6.  Here we speak about the third movement's jumpy beats. and how these rhythmic anticipations give the whole piece a bouncy energy.  Bach, the expert violist among so many other things, gives the two viola parts the most intricate material, playing off each other and passing along the musical line.  Yet, in the ritornellos, he always doubles them, allowing for a rich, sweet viola tone to dominate in this delightful musical treat.
Netherlands Bach Society performs Brandenburg 6 (skip to 3rd movement); Shunske Sato, artistic director

Welcome back to our yearly miniseries on the Brandenburg Concertos of J. S. Bach! This is part two of three. Today we look at the languid and luscious slow movement of Brandenburg Concerto No. 6.
Music is (often) a setup of expectations, and then the satisfying fulfillment of those expectations OR the clever subversion of those expectations. Bach is especially good at this principle. We focus first on the unusual written-out cello part, separate from the basso continuo, creating a new entity but bound to the bass still (heterophony). Then we look at Christian's two moments, both of expectation and then subversion.
Brandenburg 6 - movement 2 - Netherlands Bach Society