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LAME problem samples - samples

This topic should be a centralized place to post problematic samples for LAME.

You should post here:
*sample link
*short description of the problem
*LAME settings regarding the problem
*LAME version used

[span style='font-size:14pt;line-height:100%']This thread is only to collect samples. Discussion should occur in this thread.[/span]

LAME problem samples - samples

Reply #1
This sample adds distortion that sound like sandpaper. Mostly noticeable on the first "e" when she sings become.
This is for lame 3.90.3 aps but more problematic on 3.97b -V2. Adding --vbr-new worsens it even more.

Birds.flac
Is troll-adiposity coming from feederism?
With 24bit music you can listen to silence much louder!

LAME problem samples - samples

Reply #2
Here are rythmic plops added mostly on second 2-3 and louder at second 9-10.
Don´t know if plops descripe this sound correctly. Another impression would be some "pumping" noise is added. Once spotted, it is really loud.
This happens with 3.97b2 and 3.98a2 -V2 --vbr-new

It is velvet.wav and is offered at Sourceforges Lame Gpsycho test sample page
Is troll-adiposity coming from feederism?
With 24bit music you can listen to silence much louder!

LAME problem samples - samples

Reply #3
This is a sample I found in a thread but I'm sorry I don't remember it and was not able to find it again:
Trumpet sample

It is seriously distorted when encoded with Lame 3.97's and 3.96's VBR modes.
It is a bit less distorted when encoded with 3.90.3 VBR modes.
It is also distorted with 3.97b1/b2 cbr 320.

There is some listening experience (by StephanV, Wombat, myself [hope I didn't forget somebody]) in:
Using 'insane' settings (cbr 320)
The mother of all problematic samples
lame3995o -Q1.7
opus --bitrate 140


LAME problem samples - samples

Reply #5
Similar problem like Birds but should be even easier to hear when using 3.97 -V2 --vbr-new 3.97 -V2 is not much better. 3.96 does best again.
The whole sample suffers by added noise. This happens on several places on this album but to a less degree.

Deploration
Is troll-adiposity coming from feederism?
With 24bit music you can listen to silence much louder!

LAME problem samples - samples

Reply #6
How can I hear the noise?

http://my.netian.com/~lsj17/Birds.mp3

I used 3.97 b2 with -V2 --vbr-new options.
but,
I couldn't find any noise... 

Please try my link to hear...
Can you guys find any noise from the link?

or

Am I just one person who can not find the noise?

LAME problem samples - samples

Reply #7
I couldn't hear anything either.  Sounded fine to me.

LAME problem samples - samples

Reply #8
Well, if you don´t hear it, it is fine. Some people are more sensitive to different artifacts.
I don´t need any effort to hear this while i have problems hearing pretty obvious pre-echo.
Any further discussion, like the 2 posts above belong here:
Lame problem samples discussion
Is troll-adiposity coming from feederism?
With 24bit music you can listen to silence much louder!

LAME problem samples - samples

Reply #9
I found in the upload section a sample that produces a strange and very annoying artifact. This is something as phasing with modulation and dropout.

I tested in ABX with Lame 3.97b2 -V2 and Lame 3.97b2 -V2 --vbr-new; both seem to be in the same situation.

This is the sample:

aps_killer_sample

I will test with other versions of Lame. In this moment I am very busy.

LAME problem samples - samples

Reply #10
Quote
I found in the upload section a sample that produces a strange and very annoying artifact. This is something as phasing with modulation and dropout.

I tested in ABX with Lame 3.97b2 -V2 and Lame 3.97b2 -V2 --vbr-new; both seem to be in the same situation.

This is the sample:

aps_killer_sample

I will test with other versions of Lame. In this moment I am very busy.
[a href="index.php?act=findpost&pid=348627"][{POST_SNAPBACK}][/a]

Interesting sample. I'm actually able to abx it fairly easily at -V 5, which I've not been able to do with other samples. Cool!

LAME problem samples - samples

Reply #11
This piece of song is about 2 minutes long and adds noise often. As meanwhile common 3.96 -V2 --vbr-new is pretty clean! Here a small clip:

Moon


For the people above that can´t hear a problem with Birds, please try this one or Deploration and give some feedback please in the Lame problem samples discussion thread.

Edit: the problem occurs with 3.97b2 -V2 --vbr-new, of course
Is troll-adiposity coming from feederism?
With 24bit music you can listen to silence much louder!


LAME problem samples - samples

Reply #13
Quote
http://my.netian.com/~lsj17/Deploration.mp3
http://my.netian.com/~lsj17/Moon_short.mp3

Can I get some result files?  
I mean mp3 files with the noise.

Please just try my links.
I couldn't find any noise yet.
[a href="index.php?act=findpost&pid=348808"][{POST_SNAPBACK}][/a]


If these samples are 397b -V2 --vbr-new and you can´t hear something in Moon_short i doubt you ever will. Moon_short was only downloaded 5 times till now. Seems like mp3 isn´t much interesting these days here.
Is troll-adiposity coming from feederism?
With 24bit music you can listen to silence much louder!

LAME problem samples - samples

Reply #14
So..
Do you hear the noise from my links?
If you do, I guess my ears aren't good. 
Right? 

I have a question.
Is there sample original?

I mean,
Am I supposed to find the noise from your file?
or
Do I have to encode your file to hear the noise?

I encoded those files from what you uploaded, then I compared that with your file.
Is something wrong?

LAME problem samples - samples

Reply #15
Sample: angelic
A filtered sawtooth with heavy reverb and phasing.

Problem:
It sounds like someone is crumpling the styrofoam of a microphone.

Settings:
lame -qX angelic.wav

Versions:
3.90.3: Does not have this problem with either q0 or q2 (no presets used)
3.96.1: Shows a certain amount of fluttering which increases with each q level (tested 0 through 3)
3.97b2: q0 shows extreme amounts of the crumpling noise. I think everyone will be able to hear this. q1 through q3 have the same problem but to a lesser extent.

In two of the 3.97 alpha testing threads you will find some abx tests at higher settings.
http://www.hydrogenaudio.org/forums/index....ndpost&p=276433
http://www.hydrogenaudio.org/forums/index....ndpost&p=279873

edit: Easily ABXable with 3.97b2 -V2 --vbr-new: 15/16 (was clicking too fast)
edit2: removed a "don't" where it shouldn't have been.

LAME problem samples - samples

Reply #16
Sample: thunder

The comment in that post is for iTunes AAC, so never mind.

After severe iTunes problems I tested LAME and was able to ABX 397b2 -V2 --vbr-new with 10/10. -V0 --vbr-new was transparent to me with 6/10.

I'll try to describe what I'm hearing: I focused on the synth sound starting shortly after 20s. Especially that second synth which is positioned to the right sounded smoothed or smeared to me.
The idea of achieving security through national armament is, at the present state of military technique, a disastrous illusion. -- A. Einstein


LAME problem samples - samples

Reply #18
Hi, btw my 1st post here 
I know synthetic samples like this are not going to occur in normal music, but anyways here it goes.
It's a modified sawtooth wave with harmonics and stereo sorround. It produces a NASTY hissing @128kbps cbr w/ Lame 3.97b2. The hiss is about the same loudness as the sample itself  It goes away a bit with 3.98a3, but is still here. Also with -V 2 --vbr-new the bitrate inflates to 270kbps (not normal)
surround.flac

LAME problem samples - samples

Reply #19
Here's another sample, this time from real music 
It is great for pre-echo testing, 3.97b2 --preset standard has problems with it. Also in CBR mode there is some bubbling artifact accompanying the bass.

scooter.flac

edit: WinAbx (this is with 3.97b2 --preset standard)
Code: [Select]
13:29:15    1/1  p=50.0%
13:29:52    2/2  p=25.0%
13:30:21    3/3  p=12.5%
13:30:29    4/4  p=6.2%
13:30:36    5/5  p=3.1%
13:30:54    6/6  p=1.6%
13:31:02    7/7  p=0.8%


edit again- the bubbling or gurgling is gone when *not* using high quality ( -h) option




LAME problem samples - samples

Reply #23
Another sample: scooter2.flac

Problem: Ringing with bitrates up to 320k. (--preset insane)

Late edit: happens with -q 0, -q 1 and q 2

Spectrograms, that really don't say anything: original sample, Lame --preset insane sample.

WinABX (with Lame3.98a4 --preset insane -h) :
Code: [Select]
WinABX v0.42 test report
05/31/2006 16:30:19

A file: J:\scooter2.wav
B file: J:\scooter2lame.wav

Start position 00:00.0, end position 00:11.3
16:30:44    1/1  p=50.0%
16:30:50    2/2  p=25.0%
16:30:56    3/3  p=12.5%
16:31:02    4/4  p=6.2%
16:31:07    5/5  p=3.1%
16:31:13    6/6  p=1.6%
16:31:18    7/7  p=0.8%
16:31:25    8/8  p=0.4%
16:31:33    9/9  p=0.2%
16:31:42  10/10  p< 0.1%


though I can hear it only in my left ear which is better at high frequencies.

J.M.

LAME problem samples - samples

Reply #24
Another sample: scooter2.flac

Problem: Ringing with bitrates up to 320k. (--preset insane)

Do you mind trying 3.90.3 --alt-preset 270 (or alt-preset insane)?

Edited: Sorry, should go to the discussion. Can one of the moderators move it there pleease?
lame3995o -Q1.7
opus --bitrate 140

 
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