AAC on Windows?
[79 byte] By [chuckchippie] at [2007-11-9 12:20:35] 
Is there anyway for me, a windows user, to convert my MP3's to AAC's?
# 1 Re: AAC on Windows?
I wouldnt recomend doing it directly from mp3 to AAC. You should do it from CD/wav/some lossless format. To get a encoder or decoder go to
rareware.hydrogenaudio.org (i hope it spelled correct :confused:)
then click on AAC. Download the files AAC encoder 2.15 (aacenc_2.15.zip). This zip contain both AAC decoder and encoder (dos). I you dont like dos get the psyTELDrop program - it works like the ogg drop if you know that one.
Have Fun
~ Rasmus
pank2002 at 2007-11-15 17:06:40 >
# 2 Re: AAC on Windows?
Unless I'm mistaken, quality of the AAC won't be as good if you convert from MP3 (how bad will depend on what compression you used for the MP3's) as it would be if you ripped directly from original source to AAC (at equal compression). I'm sure it can be done, but I think you're going to want to wait like the rest of us Win users.MidPack at 2007-11-15 17:07:40 >
# 3 Re: AAC on Windows?
Well the files I'm using are from Kazaa, I don't have original source material, do you think it's a bad idea?From what I heard AAC was of similar quality but took up less space.
Will I be just hurting myself by converting from mp3 to AAC?
chuckchippie at 2007-11-15 17:08:39 >
# 4 Re: AAC on Windows?
Year I would. Unless you cant have your full colections on youre ipod, just keep it in MP3. BTW why use kazaa when you can emule :D
Just kidding, kazaa and p2p is baaad :roleeyes:
pank2002 at 2007-11-15 17:09:45 >
# 5 Re: AAC on Windows?
The reasoning behind not transcoding it is, as basically as I can put it, when you compress audio to mp3 format (no matter what the bitrate) you lose certain pieces of data, which is why the file becomes smaller. Uncompressing that data and recompressing it with the MP4 codec removes pieces of data as well, but not necessarily the same parts that were taken out during the MP3 compression. I don't know why i'm doing this, but have a look at this image i made. The blue line is your audio track when it's converted to mp3. there are certain parts removed by the mp3 encoder to make the file smaller. The red is that same track uncompressed, then redone with the AAC.
http://northcaf.com/_misc/transcode.gif
The green shows the same audio track as an AAC, but you're now missing the parts that were removed by the mp3, as well as by the AAC. That is why you get an audio track the size of an AAC, but with a lower quality sound.
Just for the record, because there are enough people saying "No! don't turn your mp3s into mp4s!". But most aren't too sure why not.
If you're willing to sacrifce the sound quality for the file size, go ahead. The best way to find out is to just try one, and see if you notice the difference. If you don't, then you'd might as well do it.
It depends totally on how sensitive your ears are to the imperfections.
Hope that helps.
sandeep at 2007-11-15 17:10:44 >
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