Author
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Can't hear difference between CD and MP3!
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splinter
Splinter / Kode Six
Started Topics :
61
Posts :
578
Posted : Feb 19, 2007 01:31
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the only thing i see rong with mp3s when mixing is usualy the bass will be lower once u switch it from a wav to a mp3 on a huge system,maybe even the hole track
  SPLINTER |
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Elad
Tsabeat/Sattel Battle
Started Topics :
158
Posts :
5306
Posted : Feb 19, 2007 04:00
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just use LAME 3.96 and all will be fine!
try to keep it 320 or 256 kbps....
i "almost" cant hear the diffrence... actualy depend on high end quality on the .wav file.... mp3 defintly remove/change stuff higher then 18000hz + - which usualy is just harmonics not actual body of the sound...
  www.sattelbattle.com
http://yoavweinberg.weebly.com/ |
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Enertopia
Enertopia
Started Topics :
99
Posts :
676
Posted : Feb 19, 2007 05:54
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And remember, that mostly, people who care and deal with sound will notice that, average listeners and dancers, would not give too much thought on that issue.
  www.myspace.com/enertopiapsy |
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bukboy
Hyperboreans
Started Topics :
40
Posts :
803
Posted : Feb 19, 2007 12:29
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Audio bitstream compression (not to be confused with audio dynamic range compression, as used in compressors and expanders)uses a "psychoacoustic model" to prioritise the more and less important aspects of a signal, and give a larger percentage of the allowed bandwidth to the higher priority aspects.
A loud frequency close to another soft frequency completely masks out the softer frequency, so no point in encoding it. thats how lossy compression works.(this is one of the tricks of a "psychoacoustic model")
Another trick is that sounds that are very close in time, sound the same, so also they are not encoded. Another example is, the ear is more sensitive to lower frequencies (1-3khz) then to freqs above 10kHz, so some encoders (some versions of mp3) just throw away some of the high frequencies (which contain the most data, but that we dont hear as prominantly as the low freqs) this gives rises to the flanging effect on cymbals and high freq percs that are so infamous.
There are 2 avenues to make a compressed signal sound better(from a human ear perspective)
1. Get a better psychoacoustic model.
2. increase the allowed bandwidth.
1. Ogg vorbis and AAC is much superior to mp3 at lower bitrates, but the downside is that it isnt as universally popular. So encode into these formats for superior sound at higher compression ratios, but dont expect to be able to play them everywhere.
2. As the allowed bandwidth increases, more detail can be encoded, but with the obvious reduction in compression. All audio bitstream encoders work more/less decently at bitrates above 192kbit/s. Although in double blind tests an aac encoded stream might sound better at 192kbit/s than an mp3 at 240kbit/s, this is all relative to the efficiency, and ANY encoder provided that the bitrate is high enough, will sound every bit as good as the CD to human ears. The whole encoder war is waged mainly at lower bitrates where data efficiency is critical, and one format over another might squeeze out a little more juice. But at bitrates of above 240kbit/s even audiophiles will be highly confused as to which the original stream is.
In short, mp3 is not the culprit, its high compression that is the culprit. the rest is just arguing over table scraps. |
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shamantrixx
Started Topics :
7
Posts :
549
Posted : Feb 20, 2007 00:57
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just a few remarks...
- placebo works in both directions!
- human hearing can be trained and can become few times more sensitive than in average human. There are people who can hear differences far more subtle than just mp3 to wav. For instance, I know for a case where guy was able to hear that tweeter has a delay in relation to middle and bass speaker. When monitor was tested it turned out that delay was 5 MICRO seconds. If you look in the literature you'll find that human hearing is not capable of detecting such small differences below 5 MILI seconds.
- for example... the difference between wav and mp3 on last shpongle album is huge while on some beatles album there really isn't any difference. Compression will always have greater affect on more complex and/or less dynamic sound that's using more bandwidith.
Some will never hear the difference and some will. But if you do not hear it... it's a bit stupid to assume that nobody else can hear it.
  "It occurred to me by intuition, and music was the driving force behind that intuition. My discovery was the result of musical perception"
Albert Einstein, speaking about his theory of relativity |
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Akousma
Started Topics :
8
Posts :
69
Posted : Feb 21, 2007 02:30
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undertow,,i dont understand mp3??why ?is it that dificult??i was just trying to help djones eaaring the mp3 "effect"..not trying to insinuate that u would play music live ate 96kbps!!!!but thats (00l...
peace
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