Sonata in G major for 2 Keyboards, W.A 21 (Bach, Johann Christian)

Movements/SectionsMov'ts/Sec's	2
First Publication	1778 – Paris: Sieber
Genre Categories	Sonatas; For 2 keyboards; Scores featuring keyboard soloists; For 2 players

Sheet Music

Keyboard 1
*#974191 - 0.34MB, 7 pp. - 0.0/10 2 4 6 8 10 (-) - V/V/V - 21×⇩ - Coulonnus

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Coulonnus (2025/6/5)

Keyboard 2
*#974192 - 0.32MB, 7 pp. - 0.0/10 2 4 6 8 10 (-) - V/V/V - 15×⇩ - Coulonnus

PDF scanned by D-Dl
Coulonnus (2025/6/5)

Publisher. Info.	Berlin: J.J. Hummel, n.d.
Copyright	Public Domain [tag/del/mrg]
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Complete Score
*#344733 - 3.68MB, 28 pp. - 0.0/10 2 4 6 8 10 (-) - V/V/V - 1403×⇩ - Afp0815

PDF scanned by US-R
Afp0815 (2014/9/19)

Color Cover
*#344734 - 6.31MB, 4 pp. - 0.0/10 2 4 6 8 10 (-) - V/V/V - 166×⇩ - Afp0815

PDF scanned by US-R
Afp0815 (2014/9/19)

Editor	Heinrich Schwartz (1861-1924)
Publisher. Info.	Leipzig: Steingräber Verlag, No. 2260, n.d.(ca.1919). Plate 2091.
Copyright	Public Domain [tag/del/mrg]
Misc. Notes	This file is part of the Sibley Mirroring Project.
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Complete Score (EU)
*#269653 - 1.24MB, 27 pp. - 0.0/10 2 4 6 8 10 (-) - C/31/C - 4239×⇩ - Jurabe

PDF scanned by Jurabe
Jurabe (2013/2/14)

Editor	Stephanie Hudnik (1884-19??)
Publisher. Info.	Mainz: Schott, No. 2455, 1935.
Copyright	Public Domain - Non-PD US [tag/del]
Misc. Notes	The preface is extremely unhelpful in determining the origin of this work, and is therefore more annoying than constructive.
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Work Title	Sonata for Two Keyboards
Alternative. Title	Sonate concertante à deux clavecins, Op.15 No.6
Composer	Bach, Johann Christian
Opus/Catalogue NumberOp./Cat. No.	W.A 21 ; Op.15 No.5
Internal Reference NumberInternal Ref. No.	IJB 55
Key	G major
Movements/SectionsMov'ts/Sec's	2
First Publication.	1778 – Paris: Sieber
Composer Time PeriodComp. Period	Classical
Piece Style	Classical
Instrumentation	2 keyboards

There's also another Op.15, "Six sonates pour clavecin ou forte-piano avec accompagnement de violon et violoncelle" - ah, this seems to be part of the same opus, according to BNF. See this description of the Sieber publication and of Terry's description of Op.15. See 4_Sonatas_and_2_Duetts,_Op.15 by Johann Christian Bach