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sigsep / sigsep-mus-db

Python parser and tools for MUSDB18 Music Separation Dataset
https://sigsep.github.io/sigsep-mus-db/
MIT License
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Is MUSDB18 bandwidth really 16 kHz? #69

Closed fxmarty closed 3 years ago

fxmarty commented 4 years ago

Hello,

This issue is not directly related to sigsep-mus-db repo, but I was thinking maybe @faroit or @aliutkus may give additional information on this.

After getting MUSDB18 dataset from a colleague, and plotting stft for some samples of the tracks, I get for example this:

spec

Screenshot_20200818_150320

Or after converting to wav with musdbconvert:

Screenshot_20200818_150543

On these examples, the bandwidth seem to be 17 kHz and not 16 kHz as indicated on https://sigsep.github.io/datasets/musdb.html . Is it that the MUSDB18 dataset I got not the original one, or is there an other explanation?

I was also wondering why would we keep MUSDB18 sampled at 44.1 kHz and not simply at 32 kHz (if the bandwidth is 16 kHz).

Thank you!

Félix

faroit commented 4 years ago

Hi, thanks for your feedback. I guess you are right and AAC can have up to 17 Khz. We might want to change the documentation...

Concerning the default sample rate: we wanted to use the stem format which only supports 44k as far as I know.