Dvorák cello conversion kit
It was common practice for 19th century composers to use the treble clef for cello passages in the high register, intending them to be played an octave lower. While these passages have been transcribed to tenor clef in Beethoven, for example, this false treble notation (dubbed "trouble clef" by a friend who is an amateur cellist) persists in much of Dvorák's chamber music. We realize that there is some reasonable doubt about the meaning of the notation in Dvorák, but the common performance practice is to play these sections down an octave. This kit allows you to replace the false treble clef with tenor clef, or true treble clef where necessary.

IMSLP - The International Music Score Library Project
This is a huge and growing collection of scores and parts, in a format that is downloadable and printable (mostly PDF). One of the most valuable resources on the web for chamber musicians.

Leo Ornstein
Many scores by 20th century American/Russian Composer Leo Ornstein are available for downloading free, as a labor of love by his son.

Violin Sheet Music
violinsheetmusic.org provides free downloads of printable violin music in PDF format. The music is scanned from public domain editions. Our collection features mostly classical music, but we also provide music for fiddle players, including Celtic, hymns, and more.

WIMA: Werner Icking Music Archive
Free sheet music, mostly in PDF format. A lot of Baroque, but also classical and Romantic. A lot of esoterica.

Brotons and Mercadal
Publisher of a number of contemporary Spanish composers.

ViolaViva
Chamber music pieces arranged for viola instead of other instrument.

Bagaduce Music Lending Library
3 Music Library Lane, P.O. Box 829
Blue Hill, Maine 04614-0829
Phone: 207 - 374-5121

Contains a good collection of works by Maine composers in addition to an extensive collection of chamber music: over 13,000 titles of chamber music compositions.

British Library Public Catalogue
"This service provides simple searching and ordering of documents from the British Library's extensive collections."

Chatfield Brass Band Music Lending Library
specializing in band music

City music library in Nurnberg (in German)

Finnish Music Info Centre

Indiana University’s List of Music Libraries

Libdex
Listing of libraries and on-line collections.

Library of Congress
The Online Catalog of the Library of Congress.

New York Public Library for the Performing Arts
"The New York Public Library for the Performing Arts houses the world's most extensive combination of circulating, reference, and rare archival collections in its field. These materials are available free of charge, along with a wide range of special programs, including exhibitions, seminars, and performances."

PHILADELPHIA FREE LIBRARY
With more than 27,000 titles, the Chamber Music Collection of the Free Library of Philadelphia is the largest circulating collection of its kind on the East Coast. The collection is available to amateur and professional musicians and serves ensembles of up to ten instruments, including categories for solo instruments and vocal-instrumental combinations. All periods of music are represented, from Baroque to Modern, and from Trio sonatas to jazz ensembles. Ongoing additions to the collection include contemorary works as well as new editions of standard titles. Of special note is the Yoshimada Wada Guitar Collection.

Although some chamber works are in the general on-line music collection, the bulk of the collection is not on-line and can only be accessed by mail, phone or e-mail. Conditions of loan include a refundable deposit for each work of music requested.

For more information, or to inquire about holdings, please contact the library at:

Chamber Music Collection
Music Dept.
Free Library of Philadelphia
19th and Vine Sts.
Phila., PA 19103
(215) 686-5316
E-mail: chambermusic@library.phila.gov

Sibley Music Library
At the Eastman School of Music. Of particular interest is the Sibley Digitized Material resource, which includes downloadable scans of scores (requests for material to be digitized are also accepted).

cdsheetmusic.com
Can purchase CD-ROM with thousands of pages of sheet music, chiefly strings, piano music, each about $20-$25.

Educational Music Service
will find pieces in print for reasonable prices.

Frank Music Company
Located in NYC, a dedicated old company with vast catalogue of music to buy.

Hickey’s Music Center Online
one of the internet's longest running catalogs of printed sheet music, accessories, recordings and musical instruments.

Hutchins & Rea
Another on-line music company with large collections. Located in Atlanta.

Last Resort Music Publishing
Specializing in chamber music arrangements for strings, woodwinds & brass.

Music for double reeds

Spare Parts
Sheet music exchange site for chamber music spare parts to buy and sell.

Boosey & Hawkes Music Publishers Ltd
Huge range of sheet music and scores from Boosey & Hawkes’ online shop. Specialists in classical and educational music. Comprehensive range including all publishers, not just B&H. Worldwide shipping.

cdsheetmusic.com
Can purchase CD-ROM with thousands of pages of sheet music, chiefly strings, piano music, each about $20-$25.

Cobbett Association
An international research organization dedicated to the study, evaluation and preservation of rare and neglected chamber music of special merit.

Edition Silvertrust
U.S. Publisher of rare, unknown works. Some are delightful.

Grancino Editions
Publisher of 17th and 18th century music based on early sources, in modern editions and facsimiles.

Indiana University’s list of publishers
Indiana U.’s list of publishers. Often useful for finding who publishes a rare work.

List of Music Publishers

Merton Music
This back-room operation has a vast catalogue 1300 titles, available by mail direct from London. It does not advertise, has no website of its own, has no facilities for ordering or paying electronically, and expects its customers to send a check with a printed order form. The current (2008/9) catalog can be examined or downloaded here (PDF). Prices are in pounds sterling. A supplementary catalog listing additions since 2008 can be seen here (PDF). Outside the UK it operates through a team of chamber music enthusiasts who receive payment in local currency and forward orders to London by e-mail. To order; e-mail your name and postal address to the relevant agent below who will send a catalogue and order form.

Australia: (JavaScript must be enabled to view this email address)
Germany: (JavaScript must be enabled to view this email address)
Holland: (JavaScript must be enabled to view this email address)
Sweden: (JavaScript must be enabled to view this email address)
UK: (JavaScript must be enabled to view this email address)
USA: (JavaScript must be enabled to view this email address)

In addition to string chamber music Merton also publishes a unique reference resource for its devotees – four booklets listing every string chamber work currently in print, excluding only standard classics and works still in copyright, with contact details of the publishers. Click on the relevant booklet's title to see the amazing variety of music that is on sale. Please note that Merton Music does not sell these works unless it is shown as the publisher.

Part 1. String Quartets (PDF)
Part 2. Duos to Octets (PDF)
Part 3. Strings with Piano (PDF)
Part 4. Strings with Wind (PDF)

Mona Lisa Sound, Inc.
Publishers of classic rock (Led Zeppelin, Stones, Beatles, etc.) string quartets made famous by The Hampton String Quartet.

pdms Sheet Music
Wind music site in UK.

Peakview Music publishers
Quality arrangements, transcriptions and original compositions that maintain the highest standards of artistry and creativity. Browse our shop for chamber music for strings, brass, etc. as well as string and full symphony orchestra.

Phylloscopus Publications
Phylloscopus Publications started in 1989 and offer a catalogue of chamber music mainly for wind instruments. Many of the works on the list are only available from libraries and will now be easier to obtain and to read.

Rosewood Publications
Rosewood publishes a wide variety of chamber music for wind, wind and strings, wind and piano and combinations of all three.

Beginning and Intermediate Chamber Music With Piano: A Bibliography
by Nancy O'Neill Breth
Format: Adobe PDF, 154kb
This is a graded list of chamber music with piano for early level players, including descriptive comments by the author. All works are less difficult (or of similar difficulty but shorter) than Haydn and Mozart piano trios. Some works are clearly written with children in mind, but many others are suitable for both children and adults. Only pieces recommended by the author for high musical quality are included.

Children’s Orchestra Society
Format: Excel Spreadsheet, 611Kb
Over 2000 works listed including composer and dates, title and duration of piece. A few of the pieces are graded and have comments.

Contemporary Music for Amateurs
COMA (Contemporary Music-making for Amateurs) promotes participation, for musicians of all abilities, in contemporary music. As part of this commitment, COMA commissions works from leading UK and international composers, works which are artistically challenging and suited to the technical abilities of amateur ensembles.

Double Woodwind Quintet Catalogue
Bibliography of music for double wind quintet (also called decets, dectets, decimettes, or tentets) and related works.

FindChamberMusic.com
A joint project between The American Composer's Forum and ACMP. Specializing in the music of our time, this new database enables the user to search by instrumentation, composer and keyword. Many are graded by difficulty.

GEN-GAKU String Music Database
This is one of the most extensive string ensamble music databases on the net, with the data of around 1,500 classical works. Here you can find information about string orchestra music, string chamber music, CD/sheet-music and more.

Jimmosk’s List
Jimmosk's list of unfairly unknown composers, with .WAV sound clips.

Piano-L non-standard masterpieces
Non-standard piano masterpieces written by members of the PIANO-L mailing list

Schwartz’s List
underrated masterpieces, by composers famous and obscure

Smelly Cheese
composers considered acquired tastes by Randolph Pitts

Yoel Epstein’s modified COS list
Format: Excel Spreadsheet, 75Kb
Another version of the Children's Orchestra Society list mentioned above but reformatted and with new material.