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Old 16th August 2006, 18:04   #1
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Default Bit-Rate Conversion Query

Hi Guys,

Wanted to know if I convert a existing MP3 which is 128kbps to 320kbps will there be an improvement in the sound quality or do I need to directly convert the wave file to mp3 @320kbps. Problem is all the files on my hard disk in MP3 format were converted @128kbps.

Also is there some free software which will allow me to adjust all my tracks at the same volume level or if someone can email me the sofware @ jngoradia@gmail.com. would really appreciate it.

I have downloaded Cdex 1.70 beta but for some reason cannot get it to convert songs on my hard disk only allows conversion form CD's.

Please help.

Viper

Last edited by viper : 16th August 2006 at 18:05.
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Old 16th August 2006, 18:10   #2
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Quote:
Originally Posted by viper
Hi Guys,
Also is there some free software which will allow me to adjust all my tracks at the same volume level or if someone can email me the sofware @ jngoradia@gmail.com. would really appreciate it.
Viper
i am not guru on mp3's. There is volume leveller software on mp3's. its called mp3 gain. i have tried some others for volume leveller. this one is quite fast. i can send u the software and u can give a try. http://mp3gain.sourceforge.net/download.php.
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Old 16th August 2006, 18:14   #3
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Quote:
Originally Posted by viper
Hi Guys,

Wanted to know if I convert a existing MP3 which is 128kbps to 320kbps will there be an improvement in the sound quality

Viper
No... By doing so, you would not gain any improvement in the sound quality.

When the MP3 was encoded at 128 kbps some of the sound information was lost due to quantization

http://en.wikipedia.org/wiki/Quantiz..._processing%29

and obviously you cant introduce what was lost by just encoding it at a higher bitrate
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Old 16th August 2006, 18:18   #4
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I agree with Dogdiga, you will not improve the sound quality of a Mp3 sampled at 128 Kbps by furthur sampling it at >128 Kbps. What you can do is get the original copy and create a new mp3 at >128 Kbps and then you will feel the difference.
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Old 16th August 2006, 18:38   #5
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Like everyone else has said, changing bitrate post conversion wont do much other than just increase the filesize. For conversions and normalization try DBPowerAMP its very easy to use and works on rightclick menu.
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Old 16th August 2006, 19:05   #6
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Once the MP3 is made, then there's no real benefit in converting to a higher bitrate. But if you're still in the process to make MP3s, then making it in the highest bitrate is advisable. Minimum??? 192KBPS sounds fine for me.
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Old 16th August 2006, 19:33   #7
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Quote:
Minimum??? 192KBPS sounds fine for me.
I've got a couple of songs at 320kbps, they're good.

For regular listening, even 128kbps is good enuf. But if you're really particular, then stick to audio cds or better still audio dvds. Imagine the quality and depth you could get from those formats, and i think audio dvds are 5.1 chl.

Shan2nu
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Old 16th August 2006, 19:54   #8
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Quote:
Originally Posted by Shan2nu
I've got a couple of songs at 320kbps, they're good.

For regular listening, even 128kbps is good enuf. But if you're really particular, then stick to audio cds or better still audio dvds. Imagine the quality and depth you could get from those formats, and i think audio dvds are 5.1 chl.

Shan2nu
I guess there are not that many audio DVDs that come with the 5.1 format except for the video ones. stereo mode is still more than 98% of music audio that comes out..
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Old 16th August 2006, 20:14   #9
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Viper, when you tried CDex 1.70, what was the format of the source songs? I dont think CDex does a re-encoding of mp3 to mp3 [lower to higher bitrates], but others would do this.

we did discuss bit rates earlier:
http://www.team-bhp.com/forum/car-en...r-stereos.html (whats the best bitrate to write cds for ur car stereos??)
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Old 16th August 2006, 20:30   #10
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Quote:
Originally Posted by speedzak
Minimum??? 192KBPS sounds fine for me.
I feel 128kbps is enough... Plus it also saves some memory on the CD or whatever storage device u are using... 192kbps doesnt make much of a diff, excepy maybe psychological, but surely consumes more memory...
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Old 16th August 2006, 22:06   #11
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Quote:
192kbps doesnt make much of a diff, excepy maybe psychological, but surely consumes more memory...
you are wrong ess a,it makes a lot of difference.yeah,if it was initially recorded in 128kbps,then nothing can be done to improve the quality,but else
you miss out a lot of frequencies on 128kbps which you will get with 192kbps
yes,memory will definitely decrease once you increase the bit-rate

i usually record at 160kbps.thats the minimum bit-rate i prefer.

Last edited by carfreak : 16th August 2006 at 22:07.
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Old 16th August 2006, 22:33   #12
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Quote:
Originally Posted by viper
Hi Guys,
do I need to directly convert the wave file to mp3 @320kbps.
Viper
Hey Viper,

Check your e-mail..
I Have Sent The Software for converting wave files to mp3 @ any bitrate.
Hope This Helps..

Cheers,
Mugen_Power.
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Old 17th August 2006, 03:01   #13
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I have made an audio cd(wav) out of mp3 files. now when I rip them onto my hardisk should I chose 320 kbps or just the 128 kbps they were originally in?
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Old 17th August 2006, 07:03   #14
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Viper, I am sorry to bust your bubble.

Once a MP3 has been encoded to say 128k recoding it to 256k wont improve sound quality. The size will double though.

Upcoding is not like Upsampling. You cant regain information already lost from coding to a lower bit rate.

MP3gain will normalise your MP3s to a set level.

Ideally if you can re rip your CDs using sometihng like CDex or EAC (with LAME) etc... it would be a cleaner nicer solution.

BTW I am of the opinion that VBR offers a better size/performance ratio than CBR esp for rock, rap, and most modern music.
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Old 17th August 2006, 07:52   #15
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Quote:
Originally Posted by khanak
I have made an audio cd(wav) out of mp3 files. now when I rip them onto my hardisk should I chose 320 kbps or just the 128 kbps they were originally in?
Khanak, the quality of your new mp3's will depend on what was the bit-rate of your original mp3's. Choosing 320 now will not help. Also, each time you convert from one format to another, you lose some quality. IMHO, dont even convert these particular audio tracks into mp3's, unless you need to.
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