Paper page - PianoCoRe: Combined and Refined Piano MIDI Dataset

Source: https://huggingface.co/papers/2605.06627

Abstract

A large-scale piano MIDI dataset called PianoCoRe is introduced, featuring unified and refined open-source corpora with diverse performances and note-level alignments for music information retrieval applications.

Symbolic music datasets with matched scores and performances are essential for manymusic information retrieval(MIR) tasks. Yet, existing resources often cover a narrow range of composers, lack performance variety, omitnote-level alignments, or use inconsistent naming formats. This work presents PianoCoRe, a large-scale pianoMIDIdataset that unifies and refines major open-source piano corpora. The dataset contains 250,046 performances of 5,625 pieces written by 483 composers, totaling 21,763 h of performed music. PianoCoRe is released in tiered subsets to support different applications: from large-scale analysis and pre-training (PianoCoRe-C and deduplicated PianoCoRe-B) to expressiveperformance modelingwith note-level score alignment (PianoCoRe-A/A*). The note-aligned subset, PianoCoRe-A, provides the largest open-source collection of 157,207 performances aligned to 1,591 scores to date. In addition to the dataset, the contributions are: (1) aMIDIquality classifier for detecting corrupted and score-like transcriptions and (2) RAScoP, analignment refinementpipeline that cleanstemporal alignment errorsand interpolates missing notes. The analysis shows that the refinement reduces temporal noise and eliminates tempo outliers. Moreover, anexpressive performance renderingmodel trained on PianoCoRe demonstrates improved robustness to unseen pieces compared to models trained on raw or smaller datasets. PianoCoRe provides a ready-to-use foundation for the next generation of expressive piano performance research.

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#### SyMuPe/Aria-MIDI-MLM Feature Extraction• Updatedabout 4 hours ago • 31 #### SyMuPe/MIDI-Quality-Classifier Updatedabout 4 hours ago • 30

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#### SyMuPe/PianoCoRe Viewer• Updatedabout 9 hours ago • 250k • 2.21k • 4

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