HydrogenAudio

Hydrogenaudio Forum => Listening Tests => Topic started by: Markuza97 on 2020-11-14 02:20:20

Title: Great killer sample, easy to ABX on most codecs
Post by: Markuza97 on 2020-11-14 02:20:20
Good evening.
Long time lurker and first time poster in here.

I found THIS (https://sourceforge.net/p/lame/bugs/506/) great sample by Jari Aalto.
He said he had some problems with LAME's V0 setting so I decided to test it myself including the other encoders, too.



MP3 is the most popular lossy codec in the world so let's test it first.
Using latest LAME 3.100.1 from RareWares.
lame -V0 input.wav

Spoiler (click to show/hide)

Very easy to ABX. I also tried --vbr-old switch and results were much better.



The second most popular lossy codec in the world, AAC-LC.
Using qaac 2.71 with CoreAudioToolbox 7.10.9.0.
qaac64 -V127 input.wav

Spoiler (click to show/hide)

I went with the highest quality setting -V127 but the problem is still there.
Drum hit at the beginning sounds different. Easy to ABX.



Opus, the most promising codec at the moment.
Using opus-tools-0.2-opus-1.3.1.zip from https://opus-codec.org/.
opusenc --bitrate 128 input.wav

Spoiler (click to show/hide)

English is not my primary language so I really don't know how to explain the difference that I can hear.
It is right around half a second. I also included the file encoded at 64 kbit/s that is very easy to ABX
and once you hear the difference you will know what exactly you need to listen to.

As you can see, I also had to change my sound card. My USB sound card just skips first ~two seconds on Opus
so I had to use PCIe card.



Everybody is focused on exhale now so let's test it.
Using latest exhale 1.0.8 from RareWares.
exhale 9 input.wav

Spoiler (click to show/hide)

Lower bitrates were not really good so I tried with higher bitrates. Still terrible. Deaf person can ABX this.
Not many people have xHE-AAC decoder so I also included the decoded file.
Title: Re: Great killer sample, easy to ABX on most codecs
Post by: Markuza97 on 2020-11-14 03:44:07
I cannot edit the original post so I apologize for double posting.
I just noticed this: DSD : WASAPI (event) : Izlaz (ASUS Xonar DGX Audio Device), 24-bit
I don't have any DSD device so I have probably chosen this by mistake.
Anyway, I didn't want that to affect the results so I redid the test using normal WASAPI.
Still not transparent.

Opus:

Spoiler (click to show/hide)

exhale:

Spoiler (click to show/hide)
Title: Re: Great killer sample, easy to ABX on most codecs
Post by: Wombat on 2020-11-14 04:57:33
This may not be of much help but from the Mega download the V0 version created with lame 3.100 has this really obvious additional noise on the beats in the beginning.
Even at V3 with an old 3.98 version this is way better.
Title: Re: Great killer sample, easy to ABX on most codecs
Post by: 2M2B on 2020-11-15 10:48:58
AAC & LAME V0 --vbr new both have horrid pre echo clicks enough i don't need ABX to tell. Yet Opus & Vorbis are transparent at 160kbps. Never seen AAC perform so badly here.

Title: Re: Great killer sample, easy to ABX on most codecs
Post by: shadowking on 2020-11-18 14:57:40
Try alternative Noise shaping mode;

-V0  --vbr-new -f
Title: Re: Great killer sample, easy to ABX on most codecs
Post by: ani_Jackal3 on 2020-12-24 06:27:40
Try alternative Noise shaping mode;

-V0  --vbr-new -f

Or try --allshort V 0 --vbr-new, Had way more gains with samples in the OP.
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