Generating log mel spectrogram using librosa

1. What is a log mel spectrogram?
2. How do you save a spectrogram in Python?
3. What is a mel scale used for?

What is a log mel spectrogram?

A mel spectrogram logarithmically renders frequencies above a certain threshold (the corner frequency). For example, in the linearly scaled spectrogram, the vertical space between 1,000 and 2,000Hz is half of the vertical space between 2,000Hz and 4,000Hz.

How do you save a spectrogram in Python?

To save the created spectrogram, first convert it to an image. It will no longer be an OpenSoundscape Spectrogram object, but instead a Python Image Library (PIL) Image object. Save the PIL Image using its save() method, supplying the filename at which you want to save the image.

What is a mel scale used for?

The mel scale is a scale of pitches judged by listeners to be equal in distance one from another. The reference point between this scale and normal frequency measurement is defined by equating a 1000 Hz tone, 40 dB above the listener's threshold, with a pitch of 1000 mels.