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LAME 3.100 alpha testing
IgorC
post Nov 8 2012, 03:29
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New build of LAME 3.100 alpha is available on http://www.rarewares.org/mp3-lame-bundle.php

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IgorC
post Nov 8 2012, 03:59
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As of bitrate for current alpha 2 it's (3.99.5 V5)<(3.100a2 V5 )<(3.99.5 V 4.999)

So I tried one sample with these settings.

CODE

ABC/HR Version 1.1 beta 2, 18 June 2004
Testname:

1R = D:\Audio\Test samples\09 Fugue Prem. Notes\lame 3.100a2\sample09 3.99.5 V5.wav
2R = D:\Audio\Test samples\09 Fugue Prem. Notes\lame 3.100a2\sample09 3.99.5 V4.999.wav
3R = D:\Audio\Test samples\09 Fugue Prem. Notes\lame 3.100a2\sample09 3.100a2 V5.wav

---------------------------------------
General Comments:

---------------------------------------
1R File: D:\Audio\Test samples\09 Fugue Prem. Notes\lame 3.100a2\sample09 3.99.5 V5.wav
1R Rating: 2.5
1R Comment:
---------------------------------------
2R File: D:\Audio\Test samples\09 Fugue Prem. Notes\lame 3.100a2\sample09 3.99.5 V4.999.wav
2R Rating: 2.8
2R Comment:
---------------------------------------
3R File: D:\Audio\Test samples\09 Fugue Prem. Notes\lame 3.100a2\sample09 3.100a2 V5.wav
3R Rating: 2.8
3R Comment:
---------------------------------------
ABX Results:
D:\Audio\Test samples\09 Fugue Prem. Notes\lame 3.100a2\sample09 3.99.5 V5.wav vs D:\Audio\Test samples\09 Fugue Prem. Notes\lame 3.100a2\sample09 3.99.5 V4.999.wav
5 out of 5, pval = 0.031




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Dynamic
post Nov 8 2012, 16:09
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QUOTE (IgorC @ Nov 8 2012, 02:59) *
So I tried one sample with these settings.


I'll share my findings, which in relation to 3.100.alpha2 back up what IgorC ABXed.

I tried the same Fugue_Premikres_notes sample as IgorC and was able to ABX the 3.100.alpha2 -V5 version (5/5 ABX). I realised this is another case of the transient+tonal problem sample class (harpsichord is usually going to be like this, and unlike guitar, you'll never expect to hear pitch-bending in a harpsichord so it can't pass as part of the music).

I was tempted to try halb27's high-bitrate short-block method (-Vn+) for this sample to see if it helped, and I still have an old (not final) version of 3.99.5y that unintentionally allowed -V5+ to be used.

I used 3.99.5yFinal to encode -V5 and 3.99.5yNotFinal to encode -V5+ and both resulting MP3 files are attached in the Upload thread along with my fb2k ABX logs. (There's a 3.99.5z version now, but the approach is slightly different).

Neither was transparent (5/5 ABX), but I felt -V5+ was better so to be sure I heard a difference, I ABXed -V5 against -V5+ and while this was harder (somewhat noisy environment today didn't help) and both had some wavering in the pitch of the harpsichord notes (esp the last note was nice and clean on the original, and cleaner on the -V5+ version, so I focused there). I knew this was tougher, so went for 10 trials, and got 9/10 ABX.

To try to describe the difference, in essence after the plucking transient, the pitch of the original lossless harpsichord was immediately a strong consistent tone. In the -V5+ version the tone seemed to come in about right then waver slightly before becoming consistent in pitch. In the -V5 version it seemed come in less precisely on-pitch and to waver a little before the bit of wavering that I picked out in the -V5+ version, so it wavered overall a little longer, seeming like about two mild pitch-bends or tremolo oscillations rather than one.

It was easy to ABX a strong consistent tone in the lossless against any of the tones that had a wavering, poorly defined starting pitch, but more difficult to focus on the duration and nature of the wavering pitch between the -V5+ and -V5 versions.

I know this is only loosely about 3.100.alpha2, which is supposed to improve the transient-tonal problems in lead-voice for example but clearly isn't enough to cope entirely with harpsichord - which is also both highly tonal and high in sharp transients.

If I get time, I might try to compare 3.100.alpha2 to 3.99.5yNotFinal -V5.
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Posts in this topic
- IgorC   LAME 3.100 alpha testing   Nov 8 2012, 03:29
- - IgorC   As of bitrate for current alpha 2 it's (3.99....   Nov 8 2012, 03:59
|- - Dynamic   QUOTE (IgorC @ Nov 8 2012, 02:59) So I tr...   Nov 8 2012, 16:09
- - halb27   I tested 3.100a2 at the -V2 quality level for lead...   Nov 8 2012, 11:40
|- - lameboy   How is the LAME header written in 3.100? (I'm ...   Nov 8 2012, 15:36
- - IgorC   halb27, Before anything. Does 3.100 -V2 comparabl...   Nov 8 2012, 15:33
|- - halb27   QUOTE (IgorC @ Nov 8 2012, 16:33) ... Doe...   Nov 8 2012, 16:07
|- - IgorC   QUOTE (halb27 @ Nov 8 2012, 12:07) Averag...   Nov 8 2012, 17:11
- - halb27   For a fair comparison (in terms of average bitrate...   Nov 8 2012, 16:29
- - Dynamic   Yes, I should have made it clear that I was really...   Nov 8 2012, 17:17
- - Porcus   IgorC: 190 vs 195 is oranges vs elephants ... seri...   Nov 8 2012, 17:23
|- - IgorC   QUOTE (Porcus @ Nov 8 2012, 13:23) IgorC:...   Nov 8 2012, 18:07
|- - halb27   QUOTE (IgorC @ Nov 8 2012, 18:07) Who gua...   Nov 8 2012, 18:20
|- - IgorC   QUOTE (halb27 @ Nov 8 2012, 14:20) A 5 kb...   Nov 8 2012, 18:50
- - halb27   Average bitrate for my test set using -V5: 3.98.4:...   Nov 8 2012, 17:27
- - halb27   I finished my -V2 listening test with herding_call...   Nov 8 2012, 17:56
- - IgorC   QUOTE (halb27 @ Nov 8 2012, 13:27) Averag...   Nov 8 2012, 17:59
- - halb27   I tested 3.100a2 -V0 for the samples that were not...   Nov 8 2012, 18:40
- - halb27   OK, so the -V5 quality improvement of this sample ...   Nov 8 2012, 19:32
- - IgorC   if 5 kbps doesn't matter then try 3.99.5 V1.9 ...   Nov 8 2012, 20:52
- - halb27   3.99.5 -V1.85 yields an average bitrate of 195 kbp...   Nov 8 2012, 21:16
- - IgorC   Thank You for understanding, halb27. MPEG tests ...   Nov 8 2012, 22:07
- - shadowking   As long as problematic samples benefit then slight...   Nov 9 2012, 02:37
|- - IgorC   QUOTE (shadowking @ Nov 8 2012, 22:37) As...   Nov 9 2012, 03:09
- - shadowking   As i can tell the recent encoders are using mega-b...   Nov 9 2012, 04:13
|- - BFG   Personally, I'm less concerned about bitrate a...   Nov 9 2012, 07:05
- - halb27   So what we've learnt is: - For an exact compa...   Nov 9 2012, 07:49
|- - saratoga   QUOTE (halb27 @ Nov 9 2012, 02:49) - Espe...   Nov 9 2012, 22:58
|- - BFG   QUOTE (saratoga @ Nov 9 2012, 15:58) I wo...   Nov 9 2012, 23:32
- - Gainless   Another sample, pre-echos on the kicks with -V 2 (...   Nov 9 2012, 20:49
- - halb27   ??? IMO a selection of tracks should be used which...   Nov 10 2012, 11:16
- - Kamedo2   I'm considering a listening test of this new L...   Dec 2 2012, 07:50
|- - Gainless   QUOTE (Kamedo2 @ Dec 2 2012, 07:50) I...   Dec 2 2012, 12:05
- - IgorC   Kamedo2, Performing a full test with an early al...   Dec 2 2012, 13:53
|- - Kamedo2   QUOTE (IgorC @ Dec 2 2012, 21:53) Perform...   Dec 2 2012, 15:40
- - Kamedo2   A small a priori test of LAME 3.100a2. 3.100VBR V3...   Dec 8 2012, 19:02
|- - IgorC   QUOTE (Kamedo2 @ Dec 8 2012, 15:02) Maybe...   Dec 9 2012, 17:41
|- - Kamedo2   QUOTE (IgorC @ Dec 10 2012, 01:41) Can I ...   Dec 9 2012, 18:43
- - halb27   Wow! This looks great! So despite its alph...   Dec 8 2012, 22:03
- - IgorC   Welcome to our world. Today You clearly hear t...   Dec 9 2012, 19:09
|- - Kamedo2   QUOTE (IgorC @ Dec 10 2012, 03:09) Today ...   Dec 9 2012, 20:17
|- - Kamedo2   QUOTE (Kamedo2 @ Dec 10 2012, 04:17) Yes,...   Dec 11 2012, 15:43
- - goa pride   lame 3.100 alpha don't write parameters to tag...   Jul 25 2013, 21:07
- - polemon   Where can I download the current sources? http://...   Aug 27 2013, 07:11
|- - halb27   QUOTE (polemon @ Aug 27 2013, 08:11) Wher...   Aug 27 2013, 07:56
|- - goa pride   more than a year has passed have found flaws? I do...   Dec 31 2013, 18:56
- - Francksoy-Wizzu   Could anyone help me succeding using the current b...   Apr 23 2014, 13:20


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