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# MIDI Recognition
## 1. merge_wavs.py
Merge short audio clips into long audio segments of similar length (e.g. 4 min) and a fixed sampling rate (e.g. 16000) and save the timestamps into tags.json.
## 2. extract_midi.py
Extract MIDI sequences from of OpenSVIP json files, split them back into short clips according to tags.json, and add them into transcriptions.csv.
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