Miguel Pérez

There is a [directory](https://github.com/MTG/essentia/tree/master/test/src/qa/hpcp) with some QA for HPCP but is outdated and do not work. I'm currently working on adapting it to the actual Essentia version, but I wonder...

Loading tracks from Slakh in windows result in an exception. In [slakh.py](https://github.com/mir-dataset-loaders/mirdata/blob/e591c5411c41591e8606812df869dca1ad52ee0f/mirdata/datasets/slakh.py#L141) there is a particular line that uses `os.sep` to use the OS separator, but `self._track_paths["metadata"][0]` returns always the...

Some functions added

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#### Reference Issue No reference issue #### What does this implement/fix? Explain your changes. Implement a function that were not wrapped: **frequency multiply**: To multiply all frequencies by a certain...

[Help wanted] Some tests are failing

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Hi! As discussed in #123 some tests are failing. It is for now unclear what could lead to these errors. So far the tests that are failing are: - CFP...

Hi! I have noticed that [to_matrix](https://mirdata.readthedocs.io/en/latest/source/mirdata.html#mirdata.annotations.NoteData.to_matrix) and [to_sparse_index](https://mirdata.readthedocs.io/en/latest/source/mirdata.html#mirdata.annotations.NoteData.to_sparse_index) have the following description for `frequency_scale_unit` ``` frequency_scale (np.array) – array of matrix frequency values in seconds ``` Also, `to_matrix`'s call has...

Ponderation curves

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Added some functions that could be helpful to someone. Also added the possibility of execute module meter.py with the included main directly.

This pull request solves #214. Now each instrument has text and lyrics list attributes, that can be populated with MetaMessages for lyrics or text annotations