تحليل و استخلاص الخصائص الموسيقية لنغمات آلة الناي العربي

الملخص EN

Automatic music transcription of Arabian musical instruments is more difficult compared to Western musical instruments.

An important reason for this is différences in musical intervais; whereas the least interval is a semitone in Western music, it is a quarter tone in Arabian music.

In addition, automatic music transcription of the Arabian flûte (Al-Nay) is more difficult than other Arabian instruments due to its simple handcrafting which makes it more prone to tune déviation and due to difficulty in identifying the tone’s onset depending on the change in sound intensity.

This paper présents a computerized system capable of analysing and extracting musical features of Al-Nay with the aim of automating its musical transcription.

The system opération starts by the provision of an audio file to be processed through several stages with the aim of extracting its musical features.

Fundamental frequencies are extracted and tone durations are computed ending up with constructing a MIDI matrix which contains ail the data needed to generate the musical sheet.

Performance of the developed system prototype was assessed experimentally by using its output (MIDI file) as an input to “Sibelius” software.

Results of practical tests show that the proposed system operates with an accuracy rate exceeding 90%.