Melharmony concerts by Western Classical Symphonies, Chamber Orchestras, Quartets/Quintets, Jazz and World ensembles as well as Youth Symphonies & School Orchestras have enthralled listeners across the world. The pieces are typically scored with Western Notation (though individual artists have opted for other styles on occasions).
The most successful orchestras and melharmonic performers often adopt a holistic approach towards the music - not only rely on the notation but also place adequate importance on audio/videos whenever available, since notation could at times features ornamentation and graces unique to certain systems of music not seen in other cultures. For instance, the incredible varieties of oscillation seen in South Indian Carnatic system is a study by itself, which can be challenging to notate using existing Western symbols of slurs/expressions. Ravikiran has made several breakthroughs in this area in recent times even with software like Finale but subtle oscillations demand developing newer notational tools for precise communication and execution. Here is where audio helps a lot, especially for string artists who can execute many nuances by exploring techniques which may not be common in their language.
Similarly, Melharmonic pieces sometimes explore melodic/rhythmic concepts which may be intuitively easy in some cultures but may seem complicated and counter intuitive to others. But as the video illustrates, these can be overcome easily.