Results of the public multiformat listening test (July 2014) by tracks

Back to results.

Per track scores and comments of the donators, set of samples = Chris's set of samples (8 samples)

Track 1 scores and comments

Apple AAC

IgorC
4.6 some minor issues. Stability and high frequencies atenuation+distortion
kiavan92
4 Cutoff. Muddy HF. A bit narrowed stereo.

Opus 1.1

kiavan92
4.6 Stereo artifacts. Shaped but less detailed HF. OGG?

MP3 V5

kiavan92
3.5 HF ringing. Cutoff. Artifacts on very compressed snare drum. A bit muddy guitar sound.

Track 2 scores and comments

Apple AAC

kiavan92
4.5 A very bit of sibilant ringing.
win32vb
4.1 Drums slurred

Ogg Vorbis

IgorC
3 sharp grainy noise.
win32vb
4.6 Drums slightly slurred

MP3 V5

IgorC
3.4 Distortion on tonal part of voice

Track 3 scores and comments

Apple AAC

kiavan92
4 Cutoff. A bit of stereo narrowing.
psychoticmeow
4.2 Sounds very slightly dulled.
Steve Forte Rio
3.5 lowpass filtering
win32vb
2.2 Stereo ambience around drum in center removed to dead mono; missing some high frequencies.

Opus 1.1

anonymous2
4.5 A distracting sound between the kicks, a bit like rattle, which makes the hihats less clean.
IgorC
3.8 stere loss + transien smearing/bluring.
kiavan92
4.9 [Braindead] Don't know. Maybe cutoff or psy.
Steve Forte Rio
3 multiple artifacts
win32vb
3.5 Drums sound slightly swishy instead of crisp.

Ogg Vorbis

anonymous2
4.8 Not sure if it's preecho or warbling.. A subtle distortion on the highs.
IgorC
4.4 tiny hess
psychoticmeow
4.4 Some of the sounds have blurred.
Steve Forte Rio
3.8 HF modulation
win32vb
2 High drum on the left clearly bleeding to center.

MP3 V5

anonymous2
4.9 Like sample 5, but less perceptible: Not sure if it's preecho or warbling.. A subtle distortion on the highs.
IgorC
4.3 hess
kiavan92
4.7 Light HF ringing.
Steve Forte Rio
4 HF modulation
win32vb
2.4 Swishing MP3 artifacts in both high drums.

Track 4 scores and comments

Apple AAC

kiavan92
4.7 Kin of simplification within higher overtones, some details are lost.
win32vb
3.3 Trumpet's buzzing slurred at times.

Ogg Vorbis

win32vb
2.4 Stereo field unsteady; strange mid artifacts that make the trumpet player's warble at end sound worse.

MP3 V5

kiavan92
4.6 Kin of simplification within higher overtones, some details are lost.
win32vb
1.8 Strong MP3 artifacts all over.

Track 5 scores and comments

Apple AAC

anonymous2
4.5 Similar to sample 2, but in this case it is easier to spot the difference in the chip bass rather than the blips.
IgorC
3.3 tonal distortion... with some ghost frequencies.
Joungmin Lee
4.2 A little artifact around 6s
kiavan92
3.5 Buzz and tone degradation. HF ringing. Stereo artifacts. Even mid-anchor sounds more pleasant 'cause it don't try to encode such amount of data in such nasty way :)
win32vb
2 Buzzing garbled

Opus 1.1

anonymous2
4.8 Similar to sample 1: Distortion in the chip bass needs attention to ABX (but it's not difficult once the difference is recognized)
IgorC
4.3 This one is quiet acceptable. Audible but not annoying at all.
Joungmin Lee
4.7 I performed about 70 ABX trials to catch artifacts :(
kiavan92
4.4 Cutoff and a bit of stereo simplifying.
win32vb
4.5 A tad gritty sounding

Ogg Vorbis

anonymous2
4.6 pre or post-echo, or some sort of dirty sound after the "blips" compared to the reference.
IgorC
3.8 it starts actually pretty well but later some distortion has appreared.
kiavan92
4.7 [Nearly braindead] Light tonal distortion. Cutoff.
win32vb
3.7 Crackly and fuzzy

MP3 V5

anonymous2
4.8 Distortion in the chip bass needs attention to ABX (but it's not difficult once the difference is recognized)
IgorC
3.6 overall smearing. Maybe not that allocated as N? 4 sample but defeneatly worse than it.
Joungmin Lee
3.8 Between 5-7 sec, I heard artifacts of beeps.
kiavan92
4.8 [Nearly braindead] Light tonal distortion.
win32vb
4.3 I hear tinkling HF artifacts

Track 6 scores and comments

Apple AAC

anonymous2
4.2 Same problem in the same place than sample 5. Sort of flanger/chorus/reverb.
kiavan92
3 High-frequency discrimination and cut-off, a bit of tonal distorsion.

Opus 1.1

anonymous2
4.9 same place than the rest of the samples, the voice is not as clean, very slight chorus/flanger or so.
kiavan92
4.5 Strange echo.
Steve Forte Rio
4.5 Almost braindead. Something like stereo expand but less than in sample 6

Ogg Vorbis

anonymous2
4.2 Sort of a flanger-like effect in the voice in some parts. It is not clean. Probably if not compared side by side it would seem part of the recording.
kiavan92
3 High-frequency discrimination, a bit of tonal distorsion. Strange echo.
Steve Forte Rio
3.8 Something like stereo expand/reverb

MP3 V5

anonymous2
4.6 Same place than the other samples. Very slight dropout on the voice, warbling basically.

Track 7 scores and comments

Apple AAC

IgorC
4.4 false HF notes
kiavan92
4.9 [Braindead] Kind of wah-wah effect on background when bells playing simultaneously (intermodulation artifacts?).
win32vb
2.4 Attacks slurred with pre-echo; swishing artifacts in high frequencies.

Opus 1.1

IgorC
4.8 Some tiny transient issues.
win32vb
3 Stereo image sounds gritty.

Ogg Vorbis

IgorC
4.4 Some dissonance on non-transient/flat regions but very good transients.
win32vb
1.9 Sounds choppy, with tones beating unnaturally against each other.

MP3 V5

IgorC
4 Torn transients.
win32vb
2.7 Attacks lacking clarity, sounding like they are "fading" in.

Track 8 scores and comments

Apple AAC

kiavan92
4.7 Electric buzz with noise. Cut-off.
Steve Forte Rio
3.4 Lack of HF on transients
win32vb
3.8 Snapping at the end attenuated/muffled.

Ogg Vorbis

kiavan92
4.8 Electric buzz with light noise.
Steve Forte Rio
3.9 Stereo image collapse
win32vb
4.7 Hiss sounds mono and phases in and out when certain sound effects play.

MP3 V5

anonymous11
3 Tick around 25s, easy to identify, but overall better quality than Mid-low anchor.
anonymous2
4.6 Preecho at the end of the sample. Also, the background noise seems less natural (ABXd the preecho).
kiavan92
4.5 Electric buzz with strange echo. Additional sound on 25s :-・
Steve Forte Rio
2.7 A little noise granulation + pre-echo
win32vb
2.2 Swishing and specral collapse in background hiss; snapping at end slightly echo-ey.

Per track scores and comments of the donators, set of samples = Randomly picked from album libraries (8 samples)

Track 9 scores and comments

Apple AAC

Steve Forte Rio
4 Strong LPF

Opus 1.1

anonymous2
4.8 small warbling in the hats at the end, easy to miss if not paying attention (i even did 15/16 in the ABX)

Ogg Vorbis

win32vb
3 Poor stereo field.

MP3 V5

anonymous2
4.9 Similar to 2, but the warbling is more difficult to pinpoint and affects mostly the tail of the snare.

Track 10 scores and comments

Apple AAC

win32vb
2.8 High frequencies in voice completely slurred.

Opus 1.1

win32vb
4.7 Highs in the voice just a hair slurred (I believe I got the right one!).

Ogg Vorbis

win32vb
2 Poor stereo field; staticy hiss in background.

MP3 V5

Caspian
4.5Ощущается небольшая размытость.
Steve Forte Rio
4 Lack of HF
win32vb
2.4 Swirling MP3 artifacts in background and strings; high frequencies in voice slurred; slight dropout artifacts.

Track 11 scores and comments

Apple AAC

IgorC
4.7 All in all. Very good. Just some tiny mosquito noise on vocal and a bit of overall smearing (on transients as well).
kiavan92
4.8 [Braindead] Vocal higher overtones light ringing.

Opus 1.1

IgorC
4.3 Some similar issues to 1? but significantly less audible.
kiavan92
4.6 [Nearly braindead] Some stereo artifacts during complex parts. Vocal higher overtones light ringing.

Ogg Vorbis

IgorC
3.9 It sounds like sand
kiavan92
4.3 [Nearly braindead] Some stereo artifacts during complex parts. Occasional light clusterization.

MP3 V5

IgorC
3.5 warbling, overall smearing. Transients issues appear like soapy hi-hat.
kiavan92
4.2 [Just about braindead though realtime-distinguishable sometimes] Occasional light clusterization. Vocal higher overtones light ringing. Some stereo artifacts during complex parts.

Track 12 scores and comments

Apple AAC

win32vb
2.4 High freqencies slurred/gated/missing. Organ tones sound a little thin.

Ogg Vorbis

anonymous2
4.8 Difficult to ABX. The words at 9.33 are not as clean. Probably due to the instrument below. It's a sensation like blowing into a glass bottle (probably due to warbling)
win32vb
2.2 Poor stereo field.

MP3 V5

anonymous2
4.8 Like sample 1 Difficult to ABX. The words at 9.33 are not as clean. Probably due to the instrument below. It's a sensation like blowing into a glass bottle (probably due to warbling)
win32vb
3.9 MP3 artifacts in high frequencies.

Track 13 scores and comments

Apple AAC

win32vb
3.5 Strings sound funny; spectral collapse artifacts audible around guitar sounds

Ogg Vorbis

win32vb
2.8 Strings sound bad at the beginning; missing some binaural cues; fuzzy

MP3 V5

Caspian
4Шум на заднем плане потерял четкость.
win32vb
1.8 Very obvious garbling sounds throughout. This has to be MP3 since I already found the two low anchors.

Track 14 scores and comments

Apple AAC

kiavan92
4 Cutoff, light HF ringing

Opus 1.1

Steve Forte Rio
4.6 strong artifact at 8th second

MP3 V5

kiavan92
4.9 Something in the HF. Don't know exactly, but I've felt it.

Track 15 scores and comments

Apple AAC

kiavan92
4 Cutoff and/or heavy HF masking.

Opus 1.1

IgorC
4.6 soapy/blurry high frequencies. Or absence of HF?
kiavan92
4.8 [Braindead] Vocal higher overtones degradation. Open hi-hat sound light masking (or cutoff?).

Ogg Vorbis

IgorC
4 grainy
kiavan92
4.8 [Braindead] Vocal higher overtones degradation. Kind of noise shaping on open hi-hat sound.

MP3 V5

anonymous2
4.6 warbling in the hats
IgorC
4.3 warbling
kiavan92
4.7 [Nearly braindead] Vocal higher overtones light ringing. Open hi-hat sound light clusterization and cutoff.
Steve Forte Rio
3.6 lack of sharpness

Track 16 scores and comments

Apple AAC

win32vb
2.9 Audio sounds synthetic; stereo image is very poor; high frequencies quite slurred.

Opus 1.1

win32vb
4.4 Rythmic buzzing instrument ever so slightly slurred.

Ogg Vorbis

win32vb
3.3 High frequencies sound quite slurred; stereo image slightly corrupted.

MP3 V5

win32vb
2.5 Very obvious swirling MP3 artifacts throughout; however, the stereo field is good.

Per track scores and comments of the donators, set of samples = Mpeg Sequences (8 samples)

Track 17 scores and comments

Ogg Vorbis

HS
4.5 The only sample except anchors that I can ABX; the sound has a subtle unpleasant "flavor" of ..like rubbing a dusty cardboard box with very dry hands? ... I'm noticing it mostly n the first two words.. Very hard to describe.. :))
kiavan92
4.5 [Near braindead] Light HF ringing and/or transients masking. Kind of equalization and kind of echo on some sounds.
win32vb
1.8 Very audible stereo added sounds.

MP3 V5

kiavan92
4.7 [Near braindead] Light HF clusterization.
win32vb
3.1 Swirling MP3 artifacts in background and in voice high frequencies.

Track 18 scores and comments

Apple AAC

anonymous2
4.7 Difficult to abx, "is on the ground" sounds like "is on the gsround". Don't really know if this could be preecho, or simply an imperfection of the algorithm.
win32vb
2.8 Voice is noticeably distorted; triangle sounds slurred; stereo field poor.

Ogg Vorbis

anonymous2
4.8 Like sample 2. Difficult to abx, "is on the ground" sounds like "is on the gsround". Don't really know if this could be preecho, or simply an imperfection of the algorithm.
kiavan92
4.4 More HF and vocal overtones than needed. Opus?
win32vb
4.1 Voice is a tad fuzzy, lacking clarity.

MP3 V5

kiavan92
4 Vocal distortion
win32vb
3.5 Very subtle garbling artifacts around the voice.

Track 19 scores and comments

Opus 1.1

Gainless
4.3 Impossible to ABX for me, except for a very obvious distortion at the word "antiken".

Ogg Vorbis

anonymous2
4.6 Small distortion around between 3:93 and 4:69, sort of a chorus.
HS
4.5 at the beginning (the word "vielleicht" maybe? I'm bad at parsing German :) ) I hear some distortion.. I cannot decide how much I actually hear it, but I think it is stronger than the "feeling" in sample 4, so I think it deserves a bit lower score..
kiavan92
4.7 Light higher overtones degradation on 'barking' German sounds.
win32vb
2.4 An obvious harsh sound added between some words; strange added stereo sounds/artifacts; background noise has a slight, staticy mono hiss.

MP3 V5

HS
4.7 almost imperceptible for me, but I just "feel" that particulary the word around 4.5 second mark sounds more "noisy" or "dry", like if the speaker breathed out more air while saying it or something.. And ABX showed that this feeling is actually quite reliable.. :)
kiavan92
4.8 Light higher overtones degradation on 'barking' German sounds.
win32vb
3.9 Sounds slightly garbled; background noise completely garbled with MP3 artifacts.

Track 20 scores and comments

Apple AAC

kiavan92
4.8 [Braindead] Looping playback to 3/4s and listening to it for a long time can expose some things. A very bit of vocal echo.
win32vb
3.3 High frequencies slurred; slight stereo field shifts/artifacts.

Opus 1.1

IgorC
4.5 a little bit crispy
win32vb
4.3 High frequencies very slightly slurred.

Ogg Vorbis

IgorC
4.3 paper-sound artifacts. But not that bad. grainy
kiavan92
4.9 [Braindead] Looping playback to 3/4s and listening to it for a long time can expose some things. Background sounds masking.
win32vb
2 Very bad stereo image; shifting stereo artifacts. This could almost pass for mid anchor!

MP3 V5

IgorC
4.6 I was able to abx it in training mode.
kiavan92
4.9 [Braindead] Looping playback to 3/4s and listening to it for a long time can expose some things. Brighter sound of a crowd.
win32vb
3.9 High frequencies slightly slurred.

Track 21 scores and comments

Apple AAC

win32vb
4.6 The "voice" of the basses (bow hair across strings) is muffled slightly, with slight swishing in hiss.

Opus 1.1

win32vb
4.8 The "voice" of the basses (bow hair across strings) is muffled slightly.

Ogg Vorbis

IgorC
4 stereo issues
kiavan92
4.8 Mid(?) I've even switched to ABX to find it! Well, if it is what I think it is...
win32vb
2.8 Bad stereo field, fuzzy sounding.

MP3 V5

kiavan92
4.9 [Holy earbuds! I've found something] Tiny masking effect somewhere between 1.89 and 2.25 s
win32vb
3.1 Spectral collapse very audible in Clarinet harmonics.

Track 22 scores and comments

Apple AAC

win32vb
3.3 Additional garbling artifacts in high frequencies.

Ogg Vorbis

win32vb
2.7 Stereo artifacts/crosstalk in right channel; voice sounds fuzzy.

MP3 V5

win32vb
1.8 Garbling MP3 artifacts in voice.

Track 23 scores and comments

Apple AAC

IgorC
4.4 Frequency modulation. Wavy. Though it sill has acceptable quality.
kiavan92
4.8 [Near braindead] Occasionaly music degradation, some voice artifacts. Ringing on loud brass notes.
win32vb
2.8 Voice sounds rough; high frequency spectral collapse artifacts around some words.

Opus 1.1

IgorC
4.7 tiny smearing on crash cymbals.
kiavan92
4.9 [Braindead] Strange effect, kind of loudness and frequency discretization. It increaces in steps, not in smooth way.

Ogg Vorbis

IgorC
4.2 grainy artifacts
kiavan92
4.5 Light voice echo. Stereo artifacts and brass overtones degradation when voice is out.
win32vb
2.1 Voice sounds rough; poor stereo field.

MP3 V5

IgorC
3.8 crispy artifacts on speech and background music. warbling
kiavan92
4.6 Background music degradation and clusterization either with or without voice.
win32vb
3.7 High frequencies slightly garbled.

Track 24 scores and comments

Apple AAC

kiavan92
4.8 Smth within HF.
win32vb
3.4 Slurring stereo artifacts at beginning.

Opus 1.1

yourlord
4.5 Almost imperceptible other than a slight ringing after the snare attack.

Ogg Vorbis

Gainless
2.8 Very noticeable tonal distortion.
win32vb
2.2 Poor stereo field.

MP3 V5

win32vb
4.1 At beginning, slight stereo swirling artifacts.

Track 25 scores and comments

Apple AAC

IgorC
4.8 This codec makes miracle on this sample. Very subtle artifacts.
win32vb
3.6 Frequent slurring and swishing artifacts in HF

Opus 1.1

kiavan92
4.8 [Near braindead] Side channel degradation.
win32vb
4.5 Sounds just a little pale, almost imperceptible

Ogg Vorbis

IgorC
3 extra sibilancy. Grain.
kiavan92
4.8 [Braindead] Occasionaly lead vocal overtones distortion (?)
win32vb
2.4 Collapsed stereo field; sounds pale and grainy

MP3 V5

IgorC
2.5 warbling. Horrible.
kiavan92
4.5 Lead vocal echo and interference with choir.
win32vb
2 Very obvious swishing/tinkling MP3 artifacts throughout

Track 26 scores and comments

Apple AAC

kiavan92
4.7 Lowpass filter
win32vb
2.2 Poor, slurred/smeared stereo field.

Opus 1.1

win32vb
2.5 Strong stereo garbling in applause.

Ogg Vorbis

win32vb
1.9 Staticy hiss; bad/narrow stereo field.

MP3 V5

kiavan92
4.9 A bit brighter HF
win32vb
3.6 Swirling MP3 artifacts throughout, but particularly in background noise.

Track 27 scores and comments

Apple AAC

IgorC
4.3 somewhat soapy
kiavan92
4.6 Light HF ringing.
win32vb
2.3 Heavily slurred; very poor stereo field.

Opus 1.1

IgorC
4.8 Not bad at all. Some mosquito and little smearing but ok.
kiavan92
4.9 Cutoff or psy.

Ogg Vorbis

IgorC
4.4 Some grainy noise (especially on voice and background). Stereo loss
kiavan92
4.9 More HF than needed.
win32vb
3.6 Stereo field narrowed in the middle.

MP3 V5

IgorC
4.5 Not bad. Some similiarity with 2? in smearing on maracas instrument
kiavan92
4.7 Light HF ringing and tonal degradation.
win32vb
4.1 Slightly strange sounding in the high frequencies.

Track 28 scores and comments

Apple AAC

kiavan92
4.7 [Braindead] High 'breathing' vocal overtones masked by noise.

Ogg Vorbis

kiavan92
4.6 [Braindead] High 'breathing' vocal overtones masked by noise.
win32vb
2 Poor stereo field; voice sounds extra fuzzy.

MP3 V5

win32vb
1.7 Very obvious swirling MP3 artifacts in background and voice.

Track 29 scores and comments

Apple AAC

kiavan92
4 Cutoff. Nasty encoded drums (vocal is masked by artifacts of drums' reverb encoding).

Opus 1.1

IgorC
4.1 low bass tom drums have temporal distortion. Warbling, washing, smearing
kiavan92
4.9 [Braindead] Light HF ringing.

Ogg Vorbis

IgorC
4.2 grainy artifacts.
kiavan92
4.8 [Near braindead] HF are masked by noise (cymbals). HF noise is added into guitar sound. Post-echo on snare drum.

MP3 V5

kiavan92
4.7 [Near braindead] Kind of SBR everywhere (on drums especially).

Track 30 scores and comments

Apple AAC

kiavan92
4.6 Cutoff. Light HF ringing and stereo narrowing.
win32vb
2.2 Very slurred; lacking clarity; missing high frequencies.

Opus 1.1

kiavan92
4.8 Cutoff and/or less accurate HF.
win32vb
4 High drum sounds slightly slurred and centered.

Ogg Vorbis

kiavan92
4.8 More HF than needed.
win32vb
1.9 Terrible stereo field; sounds grainy

MP3 V5

kiavan92
4.7 Cutoff. A bit of HF ringing and stereo narrowing.
win32vb
3.7 High drum sounds slurred with swishing MP3 artifacts.

Track 31 scores and comments

Apple AAC

kiavan92
4 Cutoff or psy. Perceptible pre-echo on bass drum (sometimes an attack is totally lost, just blurred kick) Stereo artifacts and ringing (crash cymbal).
win32vb
2.4 High frequencies missing, slurred, and garbled.

Opus 1.1

kiavan92
4.7 Pre-echo on bass drum. [Braindead] Very light stereo artifacts (crash cymbal).

Ogg Vorbis

kiavan92
4.7 [Brindead] Stereo artifacts and kind od noise shaping (crash cymbal). Slightly blurred tom drums' attack. [Perceptible] Pre-echo on bass drum.
win32vb
2.2 Poor stereo field; garbling artifacts.

MP3 V5

kiavan92
4.6 [Near braindead] Stereo artifacts, light clusterization and kind od noise shaping (crash cymbal). [About braindead] Light pre-echo (dunno is it right) on bass drum.

Track 32 scores and comments

Apple AAC

win32vb
3.6 Sounds somewhat slurred; stereo image a little blurred, with occasional artifacts audible.

Opus 1.1

win32vb
2.7 Strong garbling artifacts in stereo field; sounds distorted.

Ogg Vorbis

kiavan92
4.8 [Braindead] Kind of modulation on few tonal sounds.
win32vb
2 Electric guitar's harmonics panned to center; sounds fuzzy.

MP3 V5

win32vb
3 Lacking clarity, with guitar attacks fading in instead of snapping in; also sounds slightly choppy, like a dirty casette tape.

Per track scores and comments of the donators, set of samples = picked from new HA thread 103989 (8 samples)

Track 33 scores and comments

Apple AAC

anonymous2
4.8 very slight preecho. difficult to get it right. (on training i did 17/22)
kiavan92
4.4 Electric piano is kind of modulated by stick strikes' reverb. Light clusterization on loud snare drum shots. Cutoff or psy during complex parts.
win32vb
2.2 Low frequency garbling sound heard leading up to the Marimba hits; high frequencies garbled.

Opus 1.1

anonymous2
4.9 Like sample 6, but i lost the exact difference a couple of times.
kiavan92
4.5 Perceptible and annoying 'clicks' when striking bars, which are not present in original sample.
win32vb
2 Loud mono chirping sound on many the Marimba hits. If it weren't for this artifact, Opus could have knocked this one out of the park!

Ogg Vorbis

anonymous2
4.8 Don't know how to describe it.. sort of warbling, The sound is not as clean, well defined.
kiavan92
4.5 Distortion or noise shaping and some stereo simplification during complex parts .
win32vb
2.6 Stereo field narrowed; grainy/coarse hiss.

MP3 V5

anonymous2
4.5 The sound is slightly muffled, the echo is partially absent. Not too easy to ABX, and probably imperceptible if not compared to the original.
kiavan92
4.8 [About braindead] Interference between tonal instruments and snare drum
win32vb
1.8 Hiss completely garbled; garbling MP3 artifacts throughout; low frequency sounds leading up to Marimba hits.

Track 34 scores and comments

Apple AAC

win32vb
3.7 Strange garbling artifacts on some low notes; spinning artifacts in some high frequencies; sounds less crisp.

Opus 1.1

win32vb
3.5 Attacks obviously less crisp.

Ogg Vorbis

win32vb
2.6 Sounds fuzzy; poor stereo field.

MP3 V5

win32vb
2.8 Sounds choppy, as if there are droputs.

Track 35 scores and comments

Apple AAC

kiavan92
4.6 [Near braindead] Voice higher overtones light clusterization. Fast guitar plucking transients are blurred. [Perceptible] Cutoff or heavy psy (esp. percussion).
win32vb
3.4 High frequency stereo artifacts.

Ogg Vorbis

kiavan92
4.8 [Near braindead] Kind of noise shaping. Stereo artifacts (tambourine).
win32vb
2 Poor stereo field.

MP3 V5

kiavan92
4.7 [Near braindead] Occasionally light HF clusterization.
win32vb
2.9 Slight garbling MP3 artifacts; slurring of high frequency detail.

Track 36 scores and comments

Apple AAC

kiavan92
4 Cutoff. Brass higher overtones degradation and light stereo field narrowing during complex parts.
win32vb
3 Audio is slurred throughout, which is a glaring AAC artifact.

Opus 1.1

kiavan92
3.6 Light HF clusterization. Moderate brass overtones degradation (less bright and w. echo effect). Reduced stereo field during complex parts.
win32vb
4.2 Triangle sounds slightly grainy, although the rest of the audio is clear.

Ogg Vorbis

kiavan92
3.8 Light brass overtones degradation (echo effect and kind of noise shaping). Reduced stereo field during complex parts.
win32vb
1.8 Poor stereo field and "pasty" audio.

MP3 V5

kiavan92
4.5 Light HF clusterization during complex parts.
win32vb
2 Very audible slurring in soft section at beginning.

Track 37 scores and comments

Apple AAC

anonymous2
4.8 Detected a small distortion (clipping like) on one of the drums, between 7.96 and 9.57.
Gainless
2.2 Bad glitch around the 4th second and slightly fuzzy at the higher end.

Opus 1.1

Steve Forte Rio
4.5 Lack of ultra-high frequencies

Ogg Vorbis

Gainless
4.7 Had to take a specific place in the sample to distinguish it, there's also a bit of distortion on the screech at the end.
Steve Forte Rio
4 stereo collapse

Track 38 scores and comments

Apple AAC

IgorC
4.5 stereo intermitent
win32vb
4.1 Voice smoothed slightly (less raspy), with some spectral collapse audible.

Opus 1.1

IgorC
4.2 crispy/mosquito on female vocal
win32vb
4.3 Slight compromise of stereo field in high frequencies.

Ogg Vorbis

IgorC
3.8 harsh/fat artifacts. Crispy and grainy + intermitent stereo as well. A festival of artifacts
win32vb
2.8 Stereo field compromised

MP3 V5

IgorC
4 water flushing artifacts.
kiavan92
4.5 Breathe HF is kind of modulated or gurgling.
win32vb
3.7 Swishing artifacts in the voices

Track 39 scores and comments

Apple AAC

anonymous8
3.5 Sounds a bit low-passed

Opus 1.1

anonymous8
4.9 Minor loss of stereo (?) in very high frequencies in some places. Very hard to pick up

Ogg Vorbis

anonymous8
4.4 Slight ringing in high frequencies
IgorC
3.5 stereo loss. Harsh artifacts

MP3 V5

anonymous8
4.7 Some cymbal clashes slightly muddy

Track 40 scores and comments

Apple AAC

kiavan92
4.4 Cutoff.
win32vb
1.9 Poor stereo field; sounds quite slurred and fuzzy; high frequencies sharply cut off.

Opus 1.1

kiavan92
4.9 [Braindead] If I ought to listen to this fragment for longer than I did then I might fall into a nirvana state and tell you what I've heard exactly.
win32vb
3.8 Buzzing sounds slightly slurred and centered.

Ogg Vorbis

anonymous2
4.8 Difficult to find (ABX 12/16). I guess it's preecho or something in the synth. It sounds a bit like a chord where it should sound like a sigle sound.
kiavan92
4.9 [Braindead] Don't know what.
win32vb
2.2 Poor stereo field; sounds fuzzy/distorted; high frequencies attenuated.

MP3 V5

anonymous2
4.9 Even though I've been able to ABX easier than 4, it was more difficult. Similar problem, synth doesn't sound as clean and single-sounding.
kiavan92
4.8 [Braindead] Buzz with very bit of echo.
win32vb
2.5 Noticeable MP3 garbling artifacts; high frequencies sharply cut off.