Algorithmic Archaeology: Reconstructing the 12th-Century 'Chagan' via AI and Nizami Ganjavi’s Verse
Discover how AI and the poetry of Nizami Ganjavi are resurrecting the lost sound of the 12th-century 'Chagan' instrument through algorithmic archaeology.

The Digital Resurrection of Musical History
Deep within the layers of Azerbaijani musical culture lie sounds that have been shrouded in silence for centuries. Today, at PromptAZ Music, we explore the revolutionary steps taken to reconstruct the timbre of the 12th-century Chagan—a mysterious bowed instrument—using AI-driven structural modeling based on the poetic descriptions of the great Nizami Ganjavi.
Musical Instruments in Nizami’s Verse
The genius poet Nizami Ganjavi did not merely describe instruments; he encoded their materials, structures, and spiritual essences within his verses. Descriptions of the Chagan are notably found in his masterpieces "Khosrow and Shirin" and "The Seven Beauties." AI algorithms translate these poetic metaphors into physical parameters, modeling the resonance of the body and the tension of the strings.
AI and Acoustic Modeling
The 'Algorithmic Archaeology' method applied in this project involves several key stages:
- Structural Modeling: Creating a 3D acoustic skeleton based on literary references to the 'pear-shaped body' and 'silk strings.'
- Material Simulation: Calculating vibration frequencies resulting from the density of walnut wood and the friction of horsehair bows.
- Mugham Compatibility: Restoring the emotional impact the Chagan would have had in the Segah (Romantic) and Hümayun (Philosophical) modes.
The Golden Fund and Future Heritage
This reconstruction is not just a journey to the past; it represents the digital future of Azerbaijan’s 'Golden Fund' archives. Reclaiming the Chagan, an ancestor to the Kamancha and Tar, means finding a missing link in our national musical identity. At PromptAZ, we aim to provide these digital timbres to modern composers, allowing the spirit of Nizami’s era to thrive in contemporary arrangements.