J.C. Bach - Symphony In B-flat Major, Opus 18 No. 2

The youngest surviving son of Johann Sebastian Bach, Johann Christian Bach was trained in music by his father and his older half-brother C.P.E. Bach. When he was twenty years old he went to Italy and converted to Catholicism, which probably sent his Lutheran ancestors rolling over in their graves. Whether out of conviction or convenience,  his conversion helped his career in Italy as he was appointed organist for the cathedral in Milan. His furthered his musical education while in Italy and began composing operas. It was on a trip to England to supervise the performance of some of his operas that he found London to his liking. He stayed there until his death in 1782.

He adopted the English equivalent of his name and was known as John Bach. He joined forces with viola da gamba and cello player Carl Abel (who was also trained by J.S. Bach) and began the Bach-Abel Concert series, the first subscription concerts in England.  Many famous performers appeared in these concerts, and various works by Haydn got their first hearing at these concerts. Bach was very popular until the late 1770's when the fickleness of the public turned their attention to other composers. He died deeply in debt in 1782. 

Carl Abel

J.C. Bach broke away from the style of music from the rest of his family and composed in the new galante style which emphasized melody with an accompaniment instead of  polyphony.  J.C. Bach didn't promote or much care for the learned style of his father, as he called him "the old wig."  He also compared himself to his brother C.P.E. Bach by saying, "My brother lives to compose; and I compose in order to live." 

Like his older brother C.P.E. Bach, J.C. Bach's music influenced many composers, most notably Mozart. Bach had met the younger composer when Mozart toured England. They played piano duets together, and the first piano concertos by Mozart were orchestrations of some of Bach's keyboard sonatas.  J.C. Bach was once credited with writing over 90 symphonies, but modern scholarship has determined that about half of that number are actual Bach compositions. The Opus 18 symphonies are some of Bach's finest works. Although composition dates are not known for all of them, they were published in 1781. The second symphony in this set is actually an overture from one of Bach's operas, Lucio Silla. Opera overtures were in fact the ancestor of the symphony and were used somewhat interchangeably. The symphony is in three movements:

I. Allegro assai - Unlike the symphonies of C.P.E. Bach, J.C. Bach uses flowing melodies. The first theme brings a fanfare quality to the fore, with  secondary parts of the theme segueing to the actual second subject, here played by a pair of flutes being answered by a pair of oboes while the strings play a simple accompaniment. The exposition is not repeated. The first theme expanded upon which constitutes the development section. Bach does not have a formal recapitulation. After the development of the main theme the secondary theme is played once again and the movement comes to a close. 

II. Andante - An example of the importance of melody in the galante style, as the tune is simply accompanied. 

III. Presto - A simple tune danced by the strings with the woodwinds adding seasoning. A contrasting middle section of answer and call between strings and woodwinds leads to a repeat of the opening and the very short finale is over.  

J.C. Bach - Keyboard Sonata Opus 5, No. 5 In E Major

Johann Christian Bach was fifteen when his father Johann Sebastian Bach died in 1750.  He went to Berlin to finish his studies with his elder half-brother C.P.E. Bach and while he was there he made his reputation as a keyboard player, especially of his older brother's works. About 1754 he moved to Italy where he immersed himself in the music and culture of the country to such an extent he converted from the Lutheran religion to Catholicism. He also began to change his style in composition from his older brother's to a style derived from his travels in Italy as well as France and England.

He originally intended to stay in England about a year when he first visited  in 1762 to stage some of his operas. His music became very popular, especially with the royal court, and he ended up living there until his death in 1782. He met the young Mozart in London in 1764 and his compositions became an influence on Mozart.

Bach began to favor the piano over the harpsichord early on, and was possibly the first performer to play on the instrument in public in England. English pianos of the time were known for their craftsmanship and innovations that gave the instrument a fuller tone and more reliable action. Haydn came to prefer English pianos also, as did Beethoven. Bach's Opus 5 consists of 6 sonatas that are designated for pianoforte or harpsichord, most likely because this was a period of transition between the two instruments and publishers naturally wanted to get as many sales as possible.  Modern day performances of the sonatas vary in the type of instrument used, just as the original printing intended. It is up to the performer to make the music 'speak' according to the instrument it is being played on.

The 5th sonata in the Opus 5 set is in three movements:
I. Allegro assai -  The movement begins with a rapid-fire figure that begins in the bass in eights notes and has the right hand enter to chase it after a sixteenth note rest. This continues for 4 measures. The bass then continues in a running wave of sixteenth notes as the treble plays a melody that is also peppered with sixteenth notes. This continues until a B major chord is reached which signals the start of the second subject which is in the dominant key of B major. The second subject is slightly more leisurely in the beginning but it soon takes off running with sixteenth notes and comes to a close on a B major chord. The exposition is repeated. The development starts with the figure from the beginning played in B major. Other material is developed, modulations occur, and the music returns to the home key of E major. During this early phase of sonata form it consisted of two parts to be repeated, the exposition and the development.

II. Adagio - This slow movement is in the key of A major with a steady broken chord accompaniment.

III. Prestissimo - A rondo with a rhythmic recurring subject. The first episode flirts with B major, the next  is in E minor. The subject reappears verbatim. The last episode modulates into related minor keys, the subject returns one last time and comes to a close.

J. C. Bach - Keyboard Sonata Opus 5 No. 2

Johann Christian Bach (1735 - 1782) was the last child born to Johann Sebastian Bach. He studied with his father until his father's death in 1750. He then studied with his older brother C.P.E. Bach who was at the time considered one of the most influential composers in Europe. 

J.C. Bach spent some time in Italy studying and playing the organ. He went to England for the premiere of three of his operas there and secured his reputation so well he became Musicmaster to the Queen and spent the rest of his life in London. He is known as the English or London Bach because of this. He composed operas, orchestral works, concertos and works for keyboard. When Mozart was still a child he met J.C. Bach who influenced Mozart's concerto style.

He wrote many sonatas for keyboard, and the sonata Opus 5 Number 2 is in D major. It is written in the galant style,  simpler music in the style of melody with accompaniment with less ornamentation and counterpoint.  In Bach's day the piano had not yet taken over from the harpsichord so his sonatas can be played on either instrument, and have even been played on the clavichord.  the sonata is in three movements.