Main characters

• Trumpee (a cute female trumpet - Snari's sister)
• Snaree (a funny male snare drum - Trumpi's brother)
• Pino (a little sweet, bubbly, and friendly male upright toy piano - Trumpi and Snari's cousin)
• Maestro Nomo (voiced by Frank Welker, a male metronome and the music teacher)
• Bone (a male trombone, father of Trumpi and Snari)
• Drumba (a female bass drum, mother of Trumpi and Snari)
• The Xylo brothers (individual keys on a xylophone)
• Grando (a male grand piano, father of Pino)
• The Narrator (voiced by Sharon Mann in English, a female narrator interacts with and talk to the Meloditties)
• Chimeo - (a female Chimes Gong-Gary’s Sister)

Supporting characters

• Pipeorg (a male pipe organ)
• Barello (a male barrel organ)
• Trebass (a male double bass, Iolin's dad)
• Mari and Bimba (marimbas)
• Rino (a female tambourine)
• Grandpa Tuba (a male Tuba, father of Bone)
• Fluto (a female in English and male in Polish flute)
• Tymp and Tump, the timpani twins
• Iolin (a male violin)
• Tarrita (a female in English and male in Polish girly girl guitar)
• Paco (a bass guitar, Electra's cousin)
• Electra (a female tomboy electric guitar)
• Jo (a male banjo)
• Andolino (a male mandolin, Tarrita's cousin)
• Robo (a male in English and female in Polish robot-shaped synthesizer)
• The Tchycapoon Tribe (a series of percussion instruments)
• Aunt Accordia (a female accordion)
• Penny (a female Penny whistle, or Tin Whistle)
• Professor Harpsy (a male Harpsichord)
• Lam, Ello and Phone (3 Jew's Harps)
• The Sax Brothers (a band of saxophones)
• Clari (a male clarinet)
• Clarence (a male bass clarinet)
• Ocarina (ocarina)
• Soon (a male scaredy-cat bassoon)
• Nola (a female bossy Pianola)
• Frenchi (a french horn)
• Tweeti (an English horn)
• Boe (a male oboe)
• Agatha (the female harp)
• Plate and Saucer (two cymbals, cousins of Trumpi and Snari)
• Gingh Gong (a giant gong)
• Viola (a viola, Iolin's mom)
• Cello (a cello, Iolin's older brother)
• Tom & Tim (a pair of tom-drums, Drumba's brothers)
• Samtar (a male Sitar)
• Gong-Gary (a male Gong Chineo’s Father)

Season 1

1. The Meloditties / Where's Do? / The Bum Note / The Way to School
2. The Mysterious Track / Splish Splash / Hide and Go Seek ... the Echo / Happy Birthday!
3. Here Not There / The Sax Brothers / Shy Fluto / A Quiet Winter
4. Soft and Loud / Wind Song / Carnival Time / Happy and Sad
5. The Yawning Double Bass / The Off-Key Guitar / Follow the Beat / Musical Theater
6. Taking Turns / Robo the Synthesizer / The Magic Carousel / Jump Up
7. Tarrita and Her Cousins / Ding Dong Bell / Big Voice, Little Voice / The Music of the Stars
8. Grandpa Tuba / The Meloditty Big Band / A Strange Lesson / Drumba, We've Got Visitors
9. Megaphone and Microphone / A Bad Day in Taratabong / Giant Pipeorg / Party Time in the Forest
10. Lamellophones / The Tympani Twins / Ghing Gong / What Soon, the Bassoon, Saw
11. Moonlight Sonata / Sound Patterns / Clary, the Chatterbox Clarinet / Professor Harpsy
12. The Amazing Harp / The Horn Friends / The Pianola / Penny Among the Pumpkins
13. Paco, the Electric Bass / Taperee Remembers / Practice Makes Perfect / The String Family

Season 2

1. Maestro Nomo and Chimeo / Bamboo Flute Madness / Vibraphone Viral / Wack a dittie
2. Sonota Madness / Ethu each / Steel Pan Willie / More on the Maracas
3. Return of Barello / Mexican Madness / Notes and Cymbals / The Shaw-Shank Rauchpfeiftion
4. Double Class / Heveannessy / Othermaohone / Pick a lo
5. Saw de Musical / H-a-r-m-o-n-I-u-m / Ka’eke’ooing / Stàn Trahn
6. Revemge of the Theatre / Back to missing Do / Sitar Situation / Year of the Gong