Compose music tool helps to create melodies. The program represents graphically the structure of melody being created. Boundaries of motives, phrases and sentences are clearly shown. The program provides the following methods of motive development: sequence, variaton, repetition, extraction, inversion, newfangled rhythm generation and so on. Chord Editor includes all frequently used triads, seventh chords and their inversions. Additionally, Chord Editor suggests the solely chords that are in harmonize with the logic of functional motion. It makes it light to create the decent harmonic procession. User can choose the system of chord inserted in a motive. Only those arrangements are suggested that are in harmonize with voice-leading rules. The Motive Editor is implemented as the traditional Piano Roll editor. The editor has a mechanism that prompts to a user how and when to conclude the non-chords tones. ear training. The program supports two file formats: '*.ptt' - own xml-based format; '*.mid' format.