Configuring AAC Properties

1. After adding files to the list, click Tools >> Settings.
2. Under General Settings, from the Convert To Audio Format box, select AAC.
3. Select the Properties tab or Properties button.

The AAC format is a variation on MP4 files, containing only audio and using the Advanced Audio Codec for compression.   They are supported on Apple's iPods and many other portable players.

Frequency

Audio Frequency is the number of times per second that the audio signal can be adjusted. Higher frequency values gives better sound fidelity, but also increases the size of the audio. Select better quality for music and lower quality for speech. To change the audio frequency, select a value from the list.  The default is 48000 Hz.  44100 Hz is the frequency used in Audio CDs.

Bitrate:

The Bitrate is the amount of information that is stored in the file to represent each second of audio.  If you set a bitrate of 256 Kbps, a 10 second video file will contain 2,560,000 bits of information. The higher the bitrate, the higher the quality but also the larger the size of the file.  

Channels

You can choose to create AAC files with either one audio channel (mono) or separate channels for the right and left speakers.  This option does not affect file size.

Add converted music to  iTunes

Digital Media Converter Pro can add converted music to iTunes and automatically generate an iTunes playlist. iTunes version 6 or higher is required for this feature.