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Topic: Opus v1.1 @ 199 kbps vs FLAC (ABX) (Read 3794 times) previous topic - next topic

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  • matthaeus
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Opus v1.1 @ 199 kbps vs FLAC (ABX)
Result of libOpus 1.1 @ 199 kbps (160 nominal) vs FLAC ABX listening test, using a problematic sample (converted from MIDI).

Code: [Select]
foo_abx 1.3.4 report
foobar2000 v1.2.9
2013/12/17 21:47:40

File A: D:\Documents\fuga1.flac
File B: D:\Documents\fuga1.opus

21:47:40 : Test started.
21:49:32 : 01/01  50.0%
21:50:11 : 02/02  25.0%
21:50:45 : 03/03  12.5%
21:51:23 : 04/04  6.3%
22:18:49 : 05/05  3.1%
22:19:50 : 06/06  1.6%
22:21:11 : 07/07  0.8%
22:23:11 : Test finished.

 ----------
Total: 7/7 (0.8%)

  • TheBashar
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Opus v1.1 @ 199 kbps vs FLAC (ABX)
Reply #1
Result of libOpus 1.1 @ 199 kbps (160 nominal) vs FLAC ABX listening test, using a problematic sample (converted from MIDI).


Could you please describe the problem that you hear.

  • matthaeus
  • [*]
Opus v1.1 @ 199 kbps vs FLAC (ABX)
Reply #2
A low-frequency compression artifact is present, similar to wind noise. You can hear it at lower bitrates more easily (~96kbps sample attached). It can be heard when using other lossy encoders, too, but opus was the worst on this sample.
Besides, a whispering effect is added to the oboe, and can be easily heard at 0:21.
I hope these issues will be corrected soon, opus is a really promising codec.
Thanks,
Matt