Sheet Music: Cosmosis for 4 Pianos (Chad Twedt)


Chad Twedt’s Cosmosis is an advanced 4-piano work that was commissioned in 2019 and premiered in 2020 by the four-piano group Piano 4te.  Includes four separate parts (8.5″ x 11″) and a full small-print study score (8.5″ x 11″).


Chad Twedt’s Cosmosis is 4-piano work that begins with a simple, dark, contemporary theme and progresses through peace and turmoil in the first half.  The second half begins a dramatic two-page buildup toward a grand finale of triumph that lasts almost to the end.

Cosmosis is an extended ostinato that follows up on the style of Twedt’s shorter ostinato pieces that are found in Ostinato Suites Nos. 1 and 2.  The ostinato occurs solely in Piano 4’s part.  It is not a strict ostinato, as the ostinato morphs and is interrupted in some places.

Cosmosis was commissioned by the four-piano group Piano 4te in 2019, who also gave a world premiere performance of the work in 2020.

Included are four separate parts (8.5″ x 11″) and a full, small-print study score (8.5″ x 11″).  The separate parts fold out flat onto the music rack (all 5 or 6 pages), allowing pianists to perform without page turns.

Difficulty:  Advanced
Performance Time:  8 minutes


Cosmosis (full small-print study score, 8.5″ x 11″), 16 pages
Cosmosis, Primo part (8.5″ x 11″), 6 pages
Cosmosis, Secondo part (8.5″ x 11″), 5 pages
Cosmosis, Terzo part (8.5″ x 11″), 6 pages
Cosmosis, Quarto part (8.5″ x 11″), 6 pages

Notes:  Sheet music is available in printed format only (no PDF available).

Publishing Date: Oct. 25, 2020
Copyright: 2020 (Opus of Orange Note)
Total Pages:  39
8.5 x 11 x 0.3 (inches, x5)

Publisher:  Opus of Orange Note
Publisher site:
Product ID: ONC4P