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Converted Wave Files - high freq missing
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YAT (vxzp violation)
IsraTrance Junior Member
Started Topics :
35
Posts :
327
Posted : Jan 26, 2005 20:06
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when i convert mp3 files to wave
(in wavelab 5.00 )
there is amount of high frequency which is lost in the convertion.. anyone knows how to avoid this??
thank you very much
  Youth of the Galaxy...
The Time Has Come To Demand Your Freedom!!!
(Doof - Youth of the galaxy, 1996) |
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NikC
BeatNik
Started Topics :
40
Posts :
601
Posted : Jan 26, 2005 20:10
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get better encoded mp3's... you can't gain from something that has already been compressed (or at least i don't think so  )
Peace |
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Triplex
Triplex
Started Topics :
22
Posts :
134
Posted : Jan 26, 2005 20:11
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get Lame which (i think) is the best mp3 encoder. search the web for optimal custom options encoding string (i think its --r3mix) or if you dont want to do it that way you can just encode at 320kbit/sec with forced stereo.
lame usually goes with razorlame, it's front end
good luck
http://triplex.trance.net |
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Triplex
Triplex
Started Topics :
22
Posts :
134
Posted : Jan 26, 2005 20:14
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get lame if you want to encode good mp3s. as for importing mp3 to wavelab it shouldn't change it's frequency response at all. all the change that happens to the audio has already happened at the mp3 encoding stage (loosy compression). if you get are not getting good high end in your mp3 in wavelab it doesn't mean that it got lost during the mp3 to wav conversion, but it was previously lost when it was being encoded from wav to mp3.
http://triplex.trance.net |
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psypox
Psypox / Bufo
Started Topics :
53
Posts :
768
Posted : Jan 27, 2005 00:13
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you cant convert wav to mp3 whitout any loos of quality!
but as triplex sayd, the best mp3 converter is lame...
use RazorLame as GUI for lame.exe
google.com after RazorLame
and then Lame.exe
hope it helps..
www.myspace.com/psypox |
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Dj Kesta
Started Topics :
0
Posts :
19
Posted : Jan 27, 2005 00:22
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lame is a very good convertor , but for the best results you should use the same softawre that was used to incode the file.
each software has a diffirent algorythem. same algorythem for incode and decode is the best way. |
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luizmenezesjr
Started Topics :
7
Posts :
37
Posted : Jan 27, 2005 00:52
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Hi Everyone,
I make a test with WHITE NOISE (all frequencies with the same power)
The method was:
1-) Creating a source 24bits, 48kHz, Stereo WAV.
2-) Generating a WHITE NOISE with -1.0db (to avoid distortion)
3-) Saving the .wav as .mp3 in the formats:
Format - Size in bytes - Compression
Wav 24bits 48kHz - 288.046 - 0,00
MP3 128Kbps 44.1kHz - 18.288 - 15,75
MP3 128Kbps 48.0kHz - 18.432 - 15,63
MP3 192Kbps 44.1kHz - 26.856 - 10,73
MP3 192Kbps 48.0kHz - 27.072 - 10,64
MP3 320Kbps 44.1kHz - 43.392 - 6,64
MP3 320Kbps 48.0kHz - 43.993 - 6,55
MP3 VBR Highest 48kHz - 42.816 - 6,55
4-) Checking all the db frequencies on each file using a Fast Fourier Transform (FFT):
(click on the name format to download the mp3 or wav file)
http://www.eletronz.com/mp3_comparison/source.wav - Wav 24bits 48kHz
http://www.eletronz.com/mp3_comparison/source.gif
http://www.eletronz.com/mp3_comparison/mp3_128_44.mp3- MP3 128Kbps 44.1kHz
http://www.eletronz.com/mp3_comparison/mp3_128_44.gif
http://www.eletronz.com/mp3_comparison/mp3_128_48.mp3 - MP3 128Kbps 48kHz
http://www.eletronz.com/mp3_comparison/mp3_128_48.gif
http://www.eletronz.com/mp3_comparison/mp3_192_44.mp3 - MP3 192Kbps 44.1kHz
http://www.eletronz.com/mp3_comparison/mp3_192_44.gif
http://www.eletronz.com/mp3_comparison/mp3_192_48.mp3 - MP3 192Kbps 48kHz
http://www.eletronz.com/mp3_comparison/mp3_192_48.gif
http://www.eletronz.com/mp3_comparison/mp3_320_44.mp3 - MP3 320Kbps 44.1kHz
http://www.eletronz.com/mp3_comparison/mp3_320_44.gif
http://www.eletronz.com/mp3_comparison/mp3_320_48.mp3 - MP3 320Kbps 48kHz
http://www.eletronz.com/mp3_comparison/mp3_320_48.gif
http://www.eletronz.com/mp3_comparison/mp3_320_48.mp3 - MP3 VBR Highest 48kHz
http://www.eletronz.com/mp3_comparison/mp3_vbr_48.gif
6-) Conclusion:
The MP3 Format removes high frequencies to compact the original wav source.
If you open any .mp3 format, you will notice a silence on the start and end of the file... So you may insert a silence on the start and end of the original wav to avoid loosing data.
If you want to distribute your files, you may use the MP3 320Kbps 48kHz format, because many high frequencies are still there after compacting.
But if you are working on 44.1kHz, the 192Kbps 44.1kHz is a good option too... Now it's up to you choose the best format...
You have to balance SIZE in bytes, and lost frequencies...
All my life I was using the Variable Bit Rate (VBR) Highest quality with 48kHz to compress my music, but now I see this format isn't good, because it looks like a MP3 128Kbps 48kHz but with low compression.
You can also check my post on
http://www.tranceaddict.com/forums/showthread.php?threadid=232147
(sorry about my English)
Abraços/Regards,
Luiz Menezes Jr.
Campinas/SP - Brazil
Eletronz Project
http://www.eletronz.com |
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YAT (vxzp violation)
IsraTrance Junior Member
Started Topics :
35
Posts :
327
Posted : Jan 28, 2005 21:06
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Quote:
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On 2005-01-26 20:14, Triplex wrote:
get lame if you want to encode good mp3s. as for importing mp3 to wavelab it shouldn't change it's frequency response at all. all the change that happens to the audio has already happened at the mp3 encoding stage (loosy compression). if you get are not getting good high end in your mp3 in wavelab it doesn't mean that it got lost during the mp3 to wav conversion, but it was previously lost when it was being encoded from wav to mp3.
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the thing is when i analyze the vbr file everything looks fine
and after i save it as wave it looks bad
Youth of the Galaxy...
The Time Has Come To Demand Your Freedom!!!
(Doof - Youth of the galaxy, 1996) |
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Elad
Tsabeat/Sattel Battle
Started Topics :
158
Posts :
5306
Posted : Jan 29, 2005 05:36
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