NoteCable

NoteCable is the effective audio converter software designed to bypass DRM control on audio content. The software can convert copy-protected music and audio book files e.g. M4P, WMA, AA and M4B. The program records audio files as they are being played and saves the recordings in unprotected audio format. Actually this is the converter for practically any audio supported by media player software. NoteCable supports almost all media player software such as iTunes, Windows Media Player, Real Player and Napster. Output formats are saved in plain MP3, WAV and WMA format.
The program uses "Virtual soundcard" technology recording streaming audio directly from media player software like iTunes, Real Player, Windows Media Player, QuickTime and WinAmp.
NoteCable supports batch mode conversion for DRM protected files however only 1 file can be converted at once. The actual converting speed is limited by the System CPU performance.
The software interface is nice-looking and easy-to-use. The settings allow configuring output folder location and structure, output file format, MP3 and WMA encoder settings. The converted files will include the same ID3 tag information as the original files do.

NoteCable is quite useful for DRM audio conversion however the converting speed is low. The program also doesn't perform video conversion and no additional features are available.