what does 'create AAC version' on itunes do ?

[bo-waleed]

and what it is for ??

 

[spinnerlys]

It creates an .m4a file encoded with AAC (Advanced Audio Codec I guess), it's more space efficient than .mp3 (MPEG-2 Layer 3 codec) files while retaining the same audible quality.

http://support.apple.com/kb/HT2947?viewlocale=en_US

 

[Peace]

It transcodes an *.mp3,*.wav audio file to Apple's AAC format.

 

[bo-waleed]

good, so it is for the iphone ?

should i do this for all my sound files and delete the original files ?

 

[spinnerlys]

good, so it is for the iphone ?

should i do this for all my sound files and delete the original files ?

It's not only for the iPhone, but all iPod models. You can do the conversion, but you may lose audio quality. Do you have that much music, that you need them to be smaller?

.mp3 files are platform independent, but .m4a files are tied to iTunes as far as I know.

Have you read the links provided?

 

[Nermal]

.mp3 files are platform independent, but .m4a files are tied to iTunes as far as I know.

AAC is supported by most devices made in the last five years, including my last four non-Apple phones (Huawei, Nokia, Sony Ericsson and HTC), Xbox 360, and pretty much any modern computer-based playback app.

 

[spinnerlys]

AAC is supported by most devices made in the last five years, including my last four non-Apple phones (Huawei, Nokia, Sony Ericsson and HTC), Xbox 360, and pretty much any modern computer-based playback app.

Thanks, I have old information as it seems.

 

[bo-waleed]

It's not only for the iPhone, but all iPod models. You can do the conversion, but you may lose audio quality. Do you have that much music, that you need them to be smaller?

.mp3 files are platform independent, but .m4a files are tied to iTunes as far as I know.

Have you read the links provided?

i have read it.

well i have about 20 giga sound files. (they are not music, they are quran )

and they are in alFF format not mp3

 

[spinnerlys]

i have read it.

well i have about 20 giga sound files. (they are not music, they are quran )

and they are in alFF format not mp3

Then converting them to .mp3 or .m4a will reduce them to 2 to 4 GB. It's your preference that decides, which format to choose. I personally use .mp3, but that is only because I was used to it and .m4a files were not accepted, when I started using compression.

 

[bo-waleed]

Then converting them to .mp3 or .m4a will reduce them to 2 to 4 GB. It's your preference that decides, which format to choose. I personally use .mp3, but that is only because I was used to it and .m4a files were not accepted, when I started using compression.

which app should i use for converting to mp3 ?

 

[Fuchal]

It is more useful for when you have a library of Apple Lossless files and need to make some quick MP3s or AAC files out of them. It is otherwise not very useful and decreases sound quality.

 

[spinnerlys]

which app should i use for converting to mp3 ?

iTunes can do that.