The purpose of the article is to study the process of creating musical projects in the GUITAR PRO 7.5 sequencer. Research methodology. The article uses a systematic approach, as well as methods of analysis and synthesis, comparison and generalisation. The scientific novelty lies in the identification and development of innovative methods of working in the GUITAR PRO 7.5 sequencer, which allows creating musical compositions from scratch using modern software tools, as well as the possibilities of using music information technologies in the further artistic practice of musicians, sound producers, sound engineers, producers and in professional music education. Conclusions. This software product is a powerful music editor that allows one to create original scores at a professional level for subsequent editing. The programme presents many necessary tools with which the user can work with a variety of musical notation symbols and a wide range of sound dynamics and tempo control, which allows you to create samples of sounding musical pieces and their phonograms. It has a powerful built-in MIDI editor, chord builder, player, metronome, and other useful tools for musicians. Guitar Pro 7.5 can be run on Windows, Linux, and Mac OS platforms. It is widely used by musicians, composers, arrangers, sound engineers, sound designers, and producers. In addition, Guitar Pro 7.5 methods can be used for studying by students who are mastering the relevant specialties in higher educational institutions. Keywords: music notation editor, score, arrangement, sound, musician, composer, sound producer, sound engineer, producer, professional music education.