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afterdawn.com > forums > digital audio > audio > small mp3 file sizes
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Small MP3 File Sizes
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tgodc
Newbie
_ 		7. August 2004 @ 10:32 _ Link to this message    Send private message to this user   
OKay, I came across a site the other day and it had a 7 MINUTE mp3 file and was only 800kb in file size. It was decent enough to listen to and was pretty good quality. Anytime i convert a WAV to Mp3 file it only halves the size of it.

Is there a program for creating small Mp3 files? I would appreciate any help towards this as my MP3 sizes are out of control compared to this.

Thanks in advance.
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The_OGS
Senior Member
_ 		7. August 2004 @ 17:33 _ Link to this message    Send private message to this user   
A typical 128Kbits/sec MP3 has a compression of more than 10:1 over Redbook-standard CD WAV.
A good rule of thumb is about a meg a minute, so your MP3 is compressed much more than this - maybe another factor of 10 ;-(
Your small audio file is probably MPEG-II not MPEG-I.
The difference is the sample frequencies of the input file. MPEG-I can handle input streams (WAV files) with a sample frequency of 48000, 44100 and 32000 Hz. MPEG-II on the other hand will support stream for 24000, 22050 16000 Hz. Basically, use MPEG-II when you want to encode with low bit rates (ie. for voice files, or if you need small MP3 files with reduced quality).
Also, the lowest bit-rate for MPEG-II is 8 Kbits/sec while for MPEG-I the lowest bit rate is 32 Kbits/s.
A quick calculation shows your MP3 is approx 16 Kbits/s. I'm sure it is mono if it sounded not too bad!
You can easily make these yourself with CDex.
100:1 compression is a little greedy though... (LoL)
http://cdexos.sourceforge.net/
Let us know how you make out :-)
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tgodc
Newbie
_ 		8. August 2004 @ 03:49 _ Link to this message    Send private message to this user   
I got CDEX, but how do i set the different frequency and ratio rate?
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shiroh
Account closed as per user's own request
_ 		8. August 2004 @ 10:32 _ Link to this message    Send private message to this user   
seems the OGS made his point clear.
my 2 cents

ogg vorbis at 48kbps beats any encoder of mp3 at 32kbps by a mile.
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tgodc
Newbie
_ 		9. August 2004 @ 02:40 _ Link to this message    Send private message to this user   
i just found a way using Sound Recorder to convert a WAV to MP3 at 64KBPS. It drastically decreased the file size.
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