Updated compliance testing for Winamp and Foobar |
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Updated compliance testing for Winamp and Foobar |
 Jun 19 2008, 20:43
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#1
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 Winamp Developer Group: Developer Posts: 662 Joined: 17-July 05 From: Ashburn, VA Member No.: 23375  |
I was curious to recreate the calculations on this page
http://www.underbit.com/resources/mpeg/audio/compliance/ So I set up some tools to test and was able to repeat the test. I have updated stats for Winamp, and calculated stats for Foobar2000. Dither was disabled. I only tested Layer 3. Winamp @16bit (These stats are identical to the Underbit page) RMS: 8.602x10^-6 (-101.31dB) Peak: 1.526x10^-5 (-96.33dB) Winamp @24bit RMS: 8.278x10^-8 (-141.64dB) Peak: 2.384x10^-7 (-132.45dB) Foobar @16bit (skipped first 529 samples as I was unable to disable decoder delay compensation) RMS: 8.611 x 10^-6 (-101.30dB) Peak: 1.538 x 10^-5 (-96.26dB) Foobar @24bit (skipped first 529 samples as I was unable to disable decoder delay compensation) RMS: 4.156x10^-8 (-147.63dB) Peak: 2.384x10^-7 (-132.45dB) |
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Jun 19 2008, 22:34
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#2
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 Group: Super Moderator Posts: 3268 Joined: 26-July 02 From: princegeorge.ca Member No.: 2796 |
Thanks for the science, benski.
-------------------- (atrix|(fb2k->e-mu 0404 usb|audio 8 dj))->hd280|jvc ha-fx35-b
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Aug 12 2008, 20:15
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#3
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Winamp Developer Group: Developer Posts: 662 Joined: 17-July 05 From: Ashburn, VA Member No.: 23375 |
Re-ran the tests using the in_mad Winamp plugin. Disabled all options. I think 24->16bit dither might be hardcoded, which would explain the poor results for 16bit.
MAD @16bit RMS: 1.932 x 10^-5 (-94.28dB) - FAILS Maximum allowable difference -101.1dB Peak: 5.805 x 10^-5 (-84.72dB) MAD @24bit RMS: 9.389 x 10^-8 (-140.55dB) Peak: 4.768 x 10^-7 (-126.43dB) This post has been edited by benski: Aug 12 2008, 21:14 |
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Aug 12 2008, 22:51
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#4
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 Group: Members Posts: 259 Joined: 1-February 08 Member No.: 50965 |
benski, could you post the results for the latest Winamp and the latest foobar2000?
Thanks! |
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Mar 15 2009, 17:06
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#5
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Group: Members Posts: 1 Joined: 15-March 09 Member No.: 67977 |
In two words, how do I read these ?
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Lo-Fi Version | Time is now: 23rd May 2013 - 19:59 |
