How do I do preprocessing on a flutter app

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So me and my team are making an audio classification app for android. We used a python backend connected to the flutter app for the actual classification part, but now we want to get rid of that and do it all in flutter with tflite. Problem is, we relied on librosa for our data preprocessing (getting a mel spectrogram) and we can't find any libraries to get mel spectrograms in flutter. Does anyone here know of one? Or can recommend another way to preprocess for our tflite model?


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