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New Problematic sample!!!
[JAZ]
post Jul 8 2002, 22:41
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I've encountered a sample that fulminates lame at any preset ( and I mean ANY, even --alt-preset insane).

http://www.terra.es/personal4/jas00010/fil...we32-20sec.flac

(try http://jaz.project-psy.com/files/awe32-20sec.flac if the other one doesn't work)

The sample comes from a self-made song (with virtual instruments), where I use chorusing. LAME produces noise in there. --alt-preset insane is nearly acceptable, but can be ABX'd (haven't tried to).
Using --alt-preset standard, the noise is more hearable, and I'm sure that anyone can hear it with -b 128

Note: I used Headphones, because it's at night. Maybe with speakers the noise is not as evident.

(As a reference, vorbis pre-rc4 with -q 5 (~160kbps) doesn't have this problem)
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rts
post Jul 12 2002, 23:43
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QUOTE
Originally posted by [JAZ]
I've encountered a sample that fulminates lame at any preset ( and I mean ANY, even --alt-preset insane).

http://www.terra.es/personal4/jas00010/fil...we32-20sec.flac

(try http://jaz.project-psy.com/files/awe32-20sec.flac if the other one doesn't work)

The sample comes from a self-made song (with virtual instruments), where I use chorusing. LAME produces noise in there. --alt-preset insane is nearly acceptable, but can be ABX'd (haven't tried to).
Using --alt-preset standard, the noise is more hearable, and I'm sure that anyone can hear it with -b 128

Note: I used Headphones, because it's at night. Maybe with speakers the noise is not as evident.

(As a reference, vorbis pre-rc4 with -q 5 (~160kbps) doesn't have this problem)


I tested with lame --alt-preset standard, and I can hear a 'breathing' sound around 8 seconds.
Easy to year. Is this the artifact you mean? Can't hear it with --xtreme or --insane though.
Is this a pre-echo? I ABX'd it 8/8 times...I know I should do at least 16 tests, but hey, it's 0:40AM
and I'm tired of listening to the clip now, 'cause the artifact occurs so far in the clip.

Edit: Spelling.

/Tobbe
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Posts in this topic
- [JAZ]   New Problematic sample!!!   Jul 8 2002, 22:41
- - Wombat   Congrats [JAZ] !! you found the first sample that...   Jul 8 2002, 23:31
- - Seed   [JAZ], I beg to differ. Vorbis pre RC4 CVS from Ju...   Jul 10 2002, 06:57
- - [JAZ]   Yes Seed, you're right. I didn't listened carefull...   Jul 10 2002, 09:44
- - plazz   What song is this?   Jul 10 2002, 18:22
- - Slo Mo Snail   Maybe you should read it again QUOTE The sample ...   Jul 10 2002, 18:45
- - [JAZ]   The song is avaiable in original form ( .psy forma...   Jul 10 2002, 21:31
- - rts   QUOTE Originally posted by [JAZ] I've encountered...   Jul 12 2002, 23:43
- - smok3   12/16 (p=0.038) = abxed | - lame 3.92 --alt-preset...   Jul 13 2002, 02:56
- - [JAZ]   QUOTE Originally posted by rts I tested with la...   Jul 14 2002, 10:14
- - Tom Servo   Vorbis 1.0 at -q 3 did compress it flawlessly (avg...   Jul 14 2002, 15:59
- - [JAZ]   Due to curiosity, I've checked the Frequency (spec...   Jul 14 2002, 20:25
- - CiTay   Moved OT discussion to http://www.hydrogenaudio.or...   Jul 15 2002, 23:14
- - [JAZ]   Attention. This sample might show a limitation in ...   Jul 16 2002, 19:29
- - treech   Damn, i can't ABX it at 320 ... :=) try freeforma...   Jul 16 2002, 19:56
- - Tom Servo   Heh, not to be offtopic, but would be bitrates at ...   Jul 16 2002, 19:59
- - treech   Just for fun i guess :diabolic:   Jul 16 2002, 20:02
- - [JAZ]   This might seem a joke, but I've been able to abx ...   Jul 16 2002, 20:41
- - JohnV   QUOTE Originally posted by [JAZ] This might seem ...   Jul 17 2002, 00:15


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