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amplitude normalisation


I have 2 questions concerning amplitude normalisation. For a research
project I will present 120 short classical pieces. I normalised all the
pieces in Cool Edit Pro 2.0 chosing Effects > Amplitude > Normalise, I
normalised to -9 decibels, L/R Equally

1. what algorythm is used to normalise

2. what is after this normalising the peak amplitude of the piece at a
classical decibel scale

I join a normalised (MP2c.wav) and a raw version (fadlin2c) of a piece

Best Regards, Clara James

Attachment: fadlin2c.wav
Description: Wave audio

Attachment: MP2c.wav
Description: Wave audio