A typical sketch involved Kermit visiting Don in his studio while he tried to write a new song. To help alleviate Don's frustrations and stop him from banging his head against his piano, Kermit would make suggestions and correct Don's mistakes. The usual result was that Don would write a strange version of a nursery rhyme, such as "Mary Had a Bicycle" instead of "Mary Had a Little Lamb." When he finished, he would perform the song, and would normally be joined by back-up singers (often Little Chrissy and the Alphabeats), who would appear seemingly from out of nowhere, or come through the door to his studio. When the character started appearing in street scenes, he was shown writing original songs not based on established compositions.
His last new appearance on the show was in Episode 2826, but his segments continued to air as part of new episodes until the end of Season 29 in 1998. According to Sesame Street Unpaved, which was published the same year, "The character, played by Richard Hunt, was abandoned because of complaints about his alarming tendencies toward self-inflicted punishment. Apparently, kids were imitating his head-banging at home."
Though absent as a character for decades, Don Music resurfaced in new appearances associated with the show's 50th anniversary, performed by Ryan Dillon. He appeared at San Diego Comic-Con in 2019 in the "Sesame Street Puppets Live!" show, the special Sesame Street's 50th Anniversary Celebration (where host Joseph Gordon-Levitt mistakes him for Guy Smiley), and in the 2019 Macy's Thanksgiving Day Parade. He also made a cameo in the 2019 animated music video "Christmas with the Count."
|Picture||Summary / First Appearance||Description|
| Mary Had a Bicycle|
| Kermit helps Don Music write a remake of "Mary's Lamb," with some back-up vocals from the Monotones.
| Yankee Doodle|
| Kermit helps Don Music finish the "Yankee Doodle" song, then because Don finds the idea of calling feathers macaroni ridiculous, they rewrite it to be a song in which Yankee Doodle stays at home cooking for his pony, puts "fat spaghetti" in a pot and calls it macaroni. Little Chrissy and the Alphabeats then come in and perform the song with Don.
| Row, Row, Row Your Boat|
| "Life is but a... but a..." With Kermit's help, Don Music manages to rewrite the tune to "Drive, drive, drive your car."
| Old MacDonald|
|Don successfully writes "Old MacDonald", with the help of Kermit and several barnyard animals.|
| Whistle, Whistle, Little Bird|
| Don Music tries to rewrite "Twinkle Twinkle Little Star." He succeeds and is joined by a country-western band.
| The Alphabet Song|
|Don Music successfully "writes" the Alphabet Song, with help from his surroundings.|
| Can You Tell Me How To Get To Yellowstone Park|
|On a stormy night, Don Music tries to rewrite the "Sesame Street Theme". With a little help from Kermit and the outdoor atmosphere, he succeeds and is joined by Little Chrissy & The Alphabeats.|
| Mystery Guest|
|Don was a contestant along with Cookie Monster and Sherlock Hemlock in game show sketch hosted by Guy Smiley. The object of the game was to wear a blindfold and guess who the mystery guest is. The mystery guest was the letter X. Don Music guessed M.|
| The American Revolution|
| Don Music plays Thomas Jefferson. Jefferson has trouble getting a replacement quill to finish the Declaration when Mr. Grover misinterprets what he needs bringing a drill, and a chicken named Phil.
- Season 14: 1729, 1814, 1824
- Season 15: 1915, 1935, 1936
- Season 16: 1971, 1972, 2035, 2043
- Season 17: 2132, 2210
- Season 18: 2285, 2325
- Season 19: 2415, 2481
- Season 20: 2560
- Season 21: 2693
- Season 22: 2795, 2826
- I'm My Mommy - I'm My Daddy (1975)
- Who's Who on Sesame Street (1977)
- The Sesame Street Dictionary (1980)
- Fix It, Please (1989 reissue)