![]() For most home video applications this will be 48kHz just like DVD-Video. This means 44,100 samples per second, which is standard for CD Audio. For more primitive applications like mobile phone ringtones a lower resolution, or bit depth, may be used. Although this is typically 16 bits (like in the example), newer formats like Blu-ray may use 24 bit samples. I prefer to use the Tree view because it lists Resolution. It can also read the tags which generally contain artist and album information from about songs or language information about audio streams in video files. MediaInfoMediaInfo can report the properties of an AAC file, including bitrate, samplerate and the number of channels. My preferred tool for this is MediaInfo, although many others can do the job. For example, if you're joining 2 files you'll need to make sure they have the same sample frequency and number of channels. That means no re-encoding will be involved so no additional quality will be lost.īefore Editing Your AAC Audio Before you start editing your AAC files you may need to find out more information about them. Lossless Editing Since AAC is a lossy compression format, meaning some information (quality) is lost during encoding, it's important to avoid decoding and re-encoding AAC audio unnecessarily. As the pages that follow will show, you can cut, join, mux, or demux with tools that are free and relatively simple to use. But that doesn't mean you won't be able to perform these basic editing tasks as easily. Due to AAC's relatively new introduction as a standard it's not as easy to find tools for editing as other formats like MP3. Whether you're extracting an audio stream from a video file, joining multiple songs so they'll play together when you use shuffle playback on your iPod, or cutting a small segment to make a ringtone you're likely to have the need to edit AAC audio eventually. With all the AAC audio around it's ineveitable that people will need to edit it. Its relative efficiency, resulting in small file sizes, even makes it suitable for use with mobile phones for ringtones and even general purpose multimedia files. #HOW DO I CHANGE AN AAC FILE TO MP3 PORTABLE#It's the standard audio format sold in the iTunes store, and as a result is widely supported in portable media players. ![]() #HOW DO I CHANGE AN AAC FILE TO MP3 MP4#Although the original version of AAC was actually an addition to the MPEG-2 specification, it's much more familiar to most people as the standard audio used in MP4 files, either alone or accompanying MPEG-4 video of some kind. Over the past few years a relative new audio format, AAC, has risen from obscurity to be one of the most common standards in use today. ![]()
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