Construction of Generative AI Piano Improvisation Accompaniment Teaching System Based on Fine-Tuned Music Large Model
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Abstract
Current approaches to piano improvisation accompaniment teaching are hampered by such aspects as delayed feedback or inadequate personalized instruction and digital tools are also limited technically in terms of music theory constraints and realtime interaction. This research builds a generative artificial intelligence teaching system using a large-scale music model fine-tuned. The system front-end obtains the student playing data through the Web MIDI API and extracts the features of non-stationary tempo and dynamic using the temporal difference normalization algorithm and exponential moving average algorithm respectively. The main accompaniment engine is based on the large-scale model ChatMusician and is fine-tuned with datasets using LoRA to generate the accompaniment in a grammatically correct way by applying harmonic constraints by implementing the Top-p sampling strategy. The back-end is dedicated to the integration of the dynamic time warping algorithms and visualization charts to give multi-dimensional quantitative feedback. The results of the experiments after 8 weeks of teaching indicated that the error rate for the experimental group was reduced to 7.6%, fluency score was 86.7 and the system usability scale score was 82.4. It has the ability to effectively reduce the harmonic grammar error in this system, enhance the playing fluency and learning independence of music learners, and offer a practical technical solution for intelligent music education.
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