mp3gain album gain understanding
Reply #2 – 2006-04-03 01:10:41
Thanks for the reply. In the meantime I ran a little test to see if I could get numbers to support this, but I was either unsuccessful or ran a bad test or am reading the results incorrectly. Here's what I did: I took two albums which I knew had a very distinct difference in volume between the two. Actually they are the same album. The original version and the remaster. Then I ran analysis on the entire sample and then on each album expecting to get different numbers for the "Album" result. But here's what I got:File MP3 gain dB gain Max Amplitude Max global_gain Min global_gain entire sample /Users/ginster/Music/sample1/2112/01 - 2112.mp3 -2 -2.56 31784.697856 210 83 /Users/ginster/Music/sample1/2112/02 - A Passage To Bangkok.mp3 -1 -1.8 30888.558592 210 113 /Users/ginster/Music/sample1/2112/03 - The Twilight Zone.mp3 0 0.38 23563.730944 210 99 /Users/ginster/Music/sample1/2112/04 - Lessons.mp3 -1 -1.97 28433.514496 210 75 /Users/ginster/Music/sample1/2112/05 - Tears.mp3 3 4.09 17995.628544 210 123 /Users/ginster/Music/sample1/2112/06 - Something For Nothing.mp3 0 0.03 22963.126272 210 119 /Users/ginster/Music/sample1/2112 [Remaster]/01 - 2112.mp3 -5 -7.45 38054.363136 210 90 /Users/ginster/Music/sample1/2112 [Remaster]/02 - A Passage To Bangkok.mp3 -5 -6.86 35406.741504 190 136 /Users/ginster/Music/sample1/2112 [Remaster]/03 - The Twilight Zone.mp3 -4 -5.89 34165.88288 192 121 /Users/ginster/Music/sample1/2112 [Remaster]/04 - Lessons.mp3 -5 -7.63 35475.357696 193 93 /Users/ginster/Music/sample1/2112 [Remaster]/05 - Tears.mp3 -3 -5.1 33300.80768 193 136 /Users/ginster/Music/sample1/2112 [Remaster]/06 - Something For Nothing.mp3 -5 -7.34 35920.084992 210 76 "Album" -4 -6.52 38054.363136 210 75 first album in sample /Users/ginster/Music/sample1/2112/01 - 2112.mp3 -2 -2.56 31784.697856 210 83 /Users/ginster/Music/sample1/2112/02 - A Passage To Bangkok.mp3 -1 -1.8 30888.558592 210 113 /Users/ginster/Music/sample1/2112/03 - The Twilight Zone.mp3 0 0.38 23563.730944 210 99 /Users/ginster/Music/sample1/2112/04 - Lessons.mp3 -1 -1.97 28433.514496 210 75 /Users/ginster/Music/sample1/2112/05 - Tears.mp3 3 4.09 17995.628544 210 123 /Users/ginster/Music/sample1/2112/06 - Something For Nothing.mp3 0 0.03 22963.126272 210 119 "Album" -4 -6.52 31784.697856 210 75 second album in sample /Users/ginster/Music/sample1/2112 [Remaster]/01 - 2112.mp3 -5 -7.45 38054.363136 210 90 /Users/ginster/Music/sample1/2112 [Remaster]/02 - A Passage To Bangkok.mp3 -5 -6.86 35406.741504 190 136 /Users/ginster/Music/sample1/2112 [Remaster]/03 - The Twilight Zone.mp3 -4 -5.89 34165.88288 192 121 /Users/ginster/Music/sample1/2112 [Remaster]/04 - Lessons.mp3 -5 -7.63 35475.357696 193 93 /Users/ginster/Music/sample1/2112 [Remaster]/05 - Tears.mp3 -3 -5.1 33300.80768 193 136 /Users/ginster/Music/sample1/2112 [Remaster]/06 - Something For Nothing.mp3 -5 -7.34 35920.084992 210 76 "Album" -4 -6.52 38054.363136 210 76 If I'm reading this correctly. It clearly shows that the remaster is going to be adjusted lower to a much greater degree than the original. The thing that surprises me is the identical values for MP3 Gain and dB Gain for all of the "Album" results. Does this make sense? Thanks!