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1
MP3 / Re: best mp3 encoder with something better than a command line interface?
Last post by BrilliantBob -
Default settings are choosen by the devlopers for a reason. If you're the kind of user who thinks posting spectrograms of mp3s is a good idea, you should probably should stick to the defaults.
Are you happy now? Check the ABX tests. The encoded sample sounds better, more vivid and selective sounds, less noise.

I posted spectograms only to see the encoded .mp3 was not butchered by the encoder (trimmed from 20 kHz to 16 kHz), as you suggest with the default settings and so on.

May you tell me what is the reason the developers locked for general use the fine tuning (psychoacoustics) of lame v3.100? I remember in lame v3.98 these settings was available, not locked. Commercial reasons whatever?

GiT gUd
2
MP3 / Re: why does the file sound better
Last post by tpijag -
Quote
Now if i convert from mp3 to flac, if i understand correctly the compression on the source will still take place, 'like winzip', the source in this case is mp3, whereas mp3 to wav there is no compression and sounds like the the file has been eq slightly.

At the very least, you seem to be confusing types of compression. Lossy compression such as used in creating a MP3 file by using a Psycho Acoustic Model to remove bits of audio that are likely to not be missed. [simplistic explanation].

Lossless compression - flac - as you referenced "like winzip' that removes 0 information and upon decoding is the same audio file as your wav file.

And your results, as others have tried to explain to you, is simply a possible difference in volume [perceived by most humans as better sound], something broken in what you are doing, or delusional, placebo thinking.

Continuing to tell us that you listen carefully and there are differences is pointless. Take the time to learn to volume level match your files and do a ABX test and report back.   Foobar2000 would be an easy and acceptable program to used for double blink ABX test.

3
MP3 / Re: why does the file sound better
Last post by greynol -
mp3 track will say compressed 89%
flac will say 36% compressed
whereas wave say 0 compressed
This is all about file size and nothing about quality.

[using my ears]
Your ears have clearly deceived you.
https://en.wikipedia.org/wiki/Placebo

Quote
TOS 8. All members that put forth a statement concerning subjective sound quality, must -- to the best of their ability -- provide objective support for their claims.  Acceptable means of support are double blind listening tests (ABX or ABC/HR) demonstrating that the member can discern a difference perceptually, together with a test sample to allow others to reproduce their findings.  non-blind listening tests [...], are not acceptable
Quote
You can read how to easily perform double blind listening tests here :
What is a blind ABX test ?
https://www.foobar2000.org/
https://www.foobar2000.org/components/view/foo_abx

As it stands your anecdotal evidence of what you hear is useless.

As was mentioned, peaks in mp3 files can go above 0 dBFS.  Insofar as to whether your operating system is limiting the mp3 file, this will need to be taken into account in order to perform an apples to apples to comparison.  However, peaks from mp3 files exceeding 0dBFS will result in wave files that will reach 0dBFS which can and likely will be limited as well.
4
MP3 / Re: why does the file sound better
Last post by saratoga -
Quote
Now if i convert from mp3 to flac, if i understand correctly the compression on the source will still take place, 'like winzip', the source in this case is mp3, whereas mp3 to wav there is no compression and sounds like the the file has been eq slightly.

No, you're misunderstanding.  Output is identical in both cases.

Quote
As i listen back to the track, i can hear the slight difference between the flac and wave track, as i hone in on the drums, snares and HH [ using my ears], the wave track is slightly brighter, giving better defintion to the instruments.

Are the output PCM samples actually any different?  If they are, something is going wrong, your software is performing extra processing, etc.  If you do it correctly, the output is identical.
5
MP3 / Re: why does the file sound better
Last post by doriandun -
I understand going from mp3 to wav is no different than going from mp3 to flac, if you use dbpoweramp, right click your mp3 file [cbr 160 was used] and click on convert, then using the drop down menu, select wave, add in the info i suggested, as a recap,  uncompressed 16bit(cd) , channels (2 stereo cd), 44,1khz.

Once the process is finished [converting] , if i check the file 'hover over using mouse, a window appears showing the track info.

mp3 track will say compressed 89%; - this is source which was ripped from a cd, years back
flac will say 36% compressed
whereas wave say 0 compressed

Now if i convert from mp3 to flac, if i understand correctly the compression on the source will still take place, 'like winzip', the source in this case is mp3, whereas mp3 to wav there is no compression and sounds like the the file has been eq slightly.

As i listen back to the track, i can hear the slight difference between the flac and wave track, as i hone in on the drums, snares and HH [ using my ears], the wave track is slightly brighter, giving better defintion to the instruments.

I picked a host of files ranging from rock, funk & soul and r&b, i also used spek to check the track, all the tracks still illustrated 160kps cbr around 16khz cut off.

Put the tracks on usb stick plugged then into my music rig,  and listened to them, paying attention to the dums, synth, and and other instruments.




7
General Audio / Re: Downsampling Vinyl-Rips to CD
Last post by dragut -
From http://sox.sourceforge.net/sox.html:
Code: [Select]
Specifically, by default, SoX automatically adds TPDF dither when the output bit-depth is less than 24 and any of the following are true

What do you do with -ac 2?
And why you convert to alac? Isn't it m4a?

You read Rollin :))

And, as he also mentioned, you can omit ac 2 and some other stuffs... ac 2 (stereo) is my simple bug: I like to write everything. In your case, without ac 2. FFMPEG will guess that it is stereo and will do well too. But it will write in the log some info about all of that...
8
MP3 / Re: why does the file sound better
Last post by greynol -
I was refering to the practice from going from mp3 to wave and then that wave file to flac. as i done in this experiement.
How did you conduct said experiment?

Going from mp3 to wave is no different than going from mp3 to flac.  There is absolutely no quality loss when going from wave to flac.
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