Suggest Some tools for AAC encoding

Please suggest some tools or programming DLLs for AAC+ encoding? Is there microsoft APIs for the AAC+ encoding? Also I want the tool/API should provide follwoing feature.. 1. Encode only based on time 2. Provide an option of fade-in/fade-out 3. Provide an option to add meta data to AAC+ file. Please suggest some tools/API..even license one also I am ready to buy.

Also I want the tool/API should provide follwoing feature.. 1. Encode only based on time 2. Provide an option of fade-in/fade-out 3. Provide an option to add meta data to AAC+ file. Please suggest some tools/API..even license one also I am ready to buy

1.) Encode based only on time? What do you mean? I.e., you give it a fixed amount of time, and it tries to do its best job? Or that the time it takes to encode should be proportional to the length (in seconds) of the input file? I don't think there are any encoders that do the former, and pretty much all encoders do some variant of the latter. Unless you mean something else...? 2.) Look into Audacity for a freeware audio editing tool. I believe it supports fade-in and fade-out. Others on this forum probably have more experience with other tools. I think Adobe Audition will do what you want (not 100% positive, never used it), but that's a MASSIVE program meant for serious audio editing, and pretty expensive. 3.) The Nero Digital link I posted earlier should have meta-tagging executables for AAC+ (which I assume you mean HE-AAC). I believe that AAC doesn't support tags directly, and you need to put the tags in the m4a or mp4 container file. Programs like Winamp or ITunes might also support tagging. Google will be your friend here -- just make sure it's a reputable tagger, not J.R. Random's tagger.

I'm pretty confident that Audacity can do that. Just cut out the part you want, save it as WAV, then convert it to an m4a / mp4.

One more quesry Is FAAC is same source code of NERO Encoder Exe. Is it different? Where Can I find Nero API dll. Is it license one?

The TinyMP4 can convert any audio or video format to .mp4 and also can rip CD audio to .mp4 too. And it just have three CBRs which is 24K,48K,64Kbps. And it can decode into PCM data(wav) directly by using right mouse click and choose "Write to wav". And it can also edit ID3 tag. Please try it at or and leave any suggestion for this little tool, thanks. If you need the AAC+ encoding API, I can prepare the SDK to you for free.

Thanks Jongan. I want SDK for encoding aac+.

ok,do you have any IM tools?