I have several videos song which i downloaded from YouTube , I was looking for a easy tool to extract audio from each of these videos and I can tell you that I found a free but perfect software for my need. Audio Extractor is a Gik Soft product that comes free and capable enough to extract audio from most of video files.
You can download Audio Extractor from Gik Soft website.
Audio Extractor has very easy to use interface, simply import video files and click on Save as button to save extracted audio file. You can use Audio extractor to extract entire audio or selected portion of it.
Input Output Formats
FLV to Mp3, FLV To Ogg, FLV To WAV, FLV To Flac
MOV to AAC, MOV to Mp3, MOV to OGG, MOV to WAV, MOV to FLAC
AVI to Mp3, AVI To Ogg, AVI To WAV, AVI To Flac
Mp4 to AAC, MP4 to Mp3, MP4 to WAV, MP4 to Ogg, MP4 to Flac
WMV to MP3, WMV to Ogg, WMV to WAV, WMV to Flac
M4A to AAC, M4A to MP3, M4A to OGG, M4A to WAV, M4A to FLAC
MP3 to MP3, MP3 to OGG, MP3 to WAV, MP3 to FLAC
AAC to MP3, AAC to WAV, AAC to OGG, AAC to Flac
Operating system: Windows 98/Me/2000/XP/2003/Vista/Server 2008/7/NT
Cost : Free