ABX test: Nero vs. Nero SSE encoder
2007-10-29 13:37:35
I noticed that the Nero AAC Win32 and Nero AAC Win32 SSE encoders produced files with different replay gain peak values when I test encoded rootkit's "Sunny" sample for another thread and became curious. I encoded the original sample using the plain -q 0.2 setting with both CLI encoder versions on a 2.8 GHz P4 & XP SP2. Then I converted both AAC-HE files to wave with Nero CLI decoder and created a difference file with Audition (phase inverted the SSE file and mix pasted into the standard file). The difference file contained considerable amount of stuff and I decided to try an ABX test, which was succesful. Nero encoder vs Nero SSE encoder (v. 1.1.34.2):foo_abx 1.3.1 report foobar2000 v0.9.4.5 2007/10/29 13:44:00 File A: E:\X\nero\NeroDigitalAudio\win32\sunny.wav File B: E:\X\nero\NeroDigitalAudio\win32\sunny_sse.wav 13:44:00 : Test started. 13:45:30 : 01/01 50.0% 13:45:46 : 02/02 25.0% 13:46:38 : 03/03 12.5% 13:46:57 : 04/04 6.3% 13:47:16 : 05/05 3.1% 13:47:41 : 06/06 1.6% 13:48:16 : 07/07 0.8% 13:48:46 : 08/08 0.4% 13:49:10 : 09/09 0.2% 13:50:10 : 10/10 0.1% 13:50:12 : Test finished. ---------- Total: 10/10 (0.1%) I tested the passage were the difference was biggest at about 17.0 - 18.5 s. I can't say which file has better quality and I don't know if my finding is useful for the developers, but I'd be interested to hear their comments. rootkit's original sample is available here: http://www.hydrogenaudio.org/forums/index....ost&id=3931 and my MP4 test files here: http://www.hydrogenaudio.org/forums/index....st&p=526235