Duplicates
Many media players have an option to detect duplicates.
Almost all of the time this is based om tags.
Similarity
Similarity has a different approach, beside tags it uses acoustic finger printing to detect duplicates.
It also has a score for quality of the recording. It is a score derived from bitrate, frequency, amplitude cut value, amplitude average value, amplitude maximum, etc.
© Vincent Kars
August 8, 2016