Do I need to remove audio DC offset with MFCC manually or not?

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#1

I have audio samples with varying DC offset. Do I need to manually remove the DC offset, or does the MFCC or Edge Impulse handle it automatically?

I tried to compare the same audio sample:

  • with DC offset: MFCC image looks “cooler”
  • without DC offset: MFCC image looks “warmer”

This suggests I must remove it manually, but I’m not sure…

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