A romantic guitar and piano duet (19th century).  
Early intermediate piano, easy to early intermediate guitar, with downloadable mp3 for audio help.
5 pages (3 pages both guitar and piano, 2 pages guitar with tablature), 3' min.

I Don't Know Why (I Just Do) with music by Fred E. Ahlert andlyrics by Roy Turk. The song was published in 1931 and has many recordings by artists as Russ Columbo, Wayne King, Frank SInatra, Linda Scott, Eden Kane, Jerry Lee Lewis and Dean Martin.

For Flute and Guitar duet or Flute, Guitar and voice.
With melody line and lyrics. With standard notation and tablature.

Early intermediate.
Pages: Four (4) pages (3 pages Melody/Flute and Guitar with tab, 1 page Melody/Flute part).

Ariette (little aria), from the opera Les Mousquetaires de la reine (1846) by Fromental Halevy, (27 May 1799 - 17 March 1862).

Guitar Duet.  Intermediate to advanced intermediate.

Pages: Four (4) pages (2 pages both guitars, 1 page guitar I, 1 page guitar II),1' min.

Mauro Giuseppe Sergio Pantaleo Giuliani (27 July 1781 8 May 1829) was an Italian guitarist, cellist, singer, and composer. He was a leading guitar virtuoso of the early 19th century.
This is the sixth of the set of 16 easy and pleasant duets for violin and guitar composed by Mauro Giulani at 1810.
For Violin and guitar duet.
With downloadable mp3's for audio help (with both the Violin and guitar and one with guitar only for practicing the Violin).  With guitar tablature.
Pages: Six pages (2 pages both Violin and guitar, 1 pages Violin part, 1 page guitar part, 2 pages guitar with guitar tablature part), 2:20' min.

Mauro Giuseppe Sergio Pantaleo Giuliani (27 July 1781 8 May 1829) was an Italian guitarist, cellist, singer, and composer. He was a leading guitar virtuoso of the early 19th century.

For Violin and guitar duet or Violin play along.

With downloadable mp3's (73 MB) (please use link on 45th page or e-mail to musicBooknet@gmail.com ) for audio help or play along the violin (mp3's with both the Violin and guitar and with guitar only for practicing the Violin). With guitar tablature.

Pages: 46 pages (parts with both Violin and guitar, parts with Violin only, parts with guitar in standard notation, parts with guitar and guitar tablature part).

Duet 1: Six pages (2 pages both Violin and guitar, 1 pages Violin part, 1 page guitar part, 2 pages guitar with guitar tablature part), 1:44' min.

Duet 2: Six pages (2 pages both Violin and guitar, 1 pages Violin part, 1 page guitar part, 2 pages guitar with guitar tablature part), 3:10' min.

Duet 3: Six pages (2 pages both Violin and guitar, 1 pages Violin part, 1 page guitar part, 2 pages guitar with guitar tablature part), 1:05' min.

Duet 4: Five pages (2 pages both Violin and guitar, 1 pages Violin part, 1 page guitar part, 1 page guitar with guitar tablature part), 2:50' min.

Duet 5: Six pages (2 pages both Violin and guitar, 1 pages Violin part, 1 page guitar part, 2 pages guitar with guitar tablature part), 2:30' min.

Duet 6: Six pages (2 pages both Violin and guitar, 1 pages Violin part, 1 page guitar part, 2 pages guitar with guitar tablature part), 2:20' min.

Duet 7: Seven pages (2 pages both Flute and guitar, 1 pages Flute part, 2 pages guitar part, 2 pages guitar with guitar tablature part), 2:20' min.

Duet 8: Four pages (1 page both Flute and guitar, 1 page Flute part, 1 page guitar part, 1 page guitar with guitar tablature part), 1:15' min.