At the same bitrate, AAC generally offers better sound quality than MP3, so if we want smaller audio file sizes while maintaining better audio quality, using the AAC format is a good choice. To convert audio to AAC, you can use HeSoft Doc Batch Tool , which supports converting audio in various formats such as MP3, WAV, and M4A to AAC, and can batch convert hundreds of files with one click, saving time and being easy to use.
When Should We Convert Audio Format to AAC
1. Reduce Audio File Size
At the same sound quality, AAC files are smaller than MP3. If we want to reduce the file size for easier uploading to platforms, converting to AAC can improve upload and transfer speeds. Additionally, when adding voiceovers or background music to videos, using the AAC format ensures audio quality while controlling the overall video size.
2. Primarily for Mobile Playback
AAC is one of the best formats natively supported by mobile operating systems. If our audio is to be sent to a phone or mainly played on mobile devices, converting to AAC provides better playback performance and greater stability.
3. Importing into Editing Software for Secondary Editing
AAC is the standard audio format for MP4 containers, offering good compatibility and stability. If we need to import video into editing software to add voiceovers or background music, or perform other edits before exporting, converting to AAC is more suitable.
Preview of Converting MP3 Audio to AAC Format
Before processing:

After processing:

Steps for Batch Converting Audio Format to AAC
1. Open HeSoft Doc Batch Tool , and select [Audio Tools] - [Audio to AAC].

2. Add the audio files you need to convert. Click add file or import files from a folder, or simply drag and drop them. Besides importing MP3 audio, it also supports M4A, WMA, WAV, OGG, and other audio formats.

3. Once the conversion is complete, click the save location to view the results; all audio files have been converted to AAC format.
