Update README.md

README.md

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 ## Limitations
-The current iteration of ChatMusician predominantly generates music in the style of Irish music, attributable to a significant portion of the dataset being sourced from this genre.
-The model exhibits hallucinations and faces limitations in supporting open-ended music generation tasks due to the lack of diversity in handcrafted music instructions.
+- For the music tasks, the model currently only supports strict format and close-ended tasks.
+- The model suffers from hallucinations, and shouldn't be used for music education.
+- A large proportion of the training data is in the style of Irish music.
+- The MusicThoeryBench results reported in the paper are obtained with perplexity mode. 
 
 ## Citation
 If you find our work helpful, feel free to give us a cite.