In Audacity using spectogram with Scale Mel I can see some clear bands for my “ring” audio fragment
my audacity settings:
For same audio fragment in edge impulse studio I see the following:
Zoomed in on the spectogram:
I assume that dark blue is low energy and yellow - red indicates high energy.
So I have difficulties mapping both MEL spectograms to each other.
- What is the frequency scale (In audacity it goes from 1 to 22050 Hz) ?
- In audacity spectogram I see a lot of energy in the low frequencies (< 1300 Hz) and in the high frequencies (> 11000 Hz) which I don’t see see in the edge impulse studio spectogram.
- The edge impulse studio spectogram shows some bands but it is unclear for which frequency ranges.
- The edge impulse studio spectogram shows small bands with some dark blue color periods. I am assuming that dark blue means that there is not much energy which is the opposite of what I see in audacity spectogram (the red bands around 6800 Hz, 7800 Hz, 8300 Hz and 9500 Hz have more energy than outside it).
- I have also shared a screenshot of the MEL settings (Algorithm / Window size / Window type / …) that I have used in audacity. I don’t know which settings are exactly used for the MEL spectogram in edge impulse studio. It would be good to share this so I can use same settings in audacity.