miniMusic NotePad for

From miniMusic:

NotePad is the perfect sketchbook for composers on the road or an effective introduction to writing and reading music. With three ways to see your songs on screen, its easy to enter music and edit your ideas. Tools include chords, key signatures, time signatures, tied notes, triplets, inversion, retrograde, and full cut/copy/paste editing.

NotePad 1.2 has a brand new polyphonic music synthesizer built-in! On compatible handhelds (like the Zire 71, Tungsten T, T2, T3, C, E, Sony Clie UX40, UX50 or TJ35) you can play chords, counterpoint and multiple tracks right on the handheld's speaker or headphone jack with no additional hardware. NotePad also supports models with built-in sound cards (like the Sony T, NR, NX, NZ and TG-series Clies or Handpring Visors using the Beat Plus Springboard module).