Support AudioSet training with weighted sampler #1727
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Weighted sampler is known to improve the mAP of models trained on AudioSet. This PR adds support training Zipformer audio tagging model with weighted sampler. The mAP comparison is below:
With weighted sampler, we achieve faster and better convergence. The pre-trained model can be downloaded here: https://huggingface.co/marcoyang/icefall-audio-tagging-audioset-zipformer-M-weighted-sampler