Audacity is a free, easy-to-use, multi-track audio editor and recorder for Windows, Mac OS X, GNU/Linux and other operating systems. The interface is translated into many languages.
The version currently hosted here is 2.1.0 (March 2015). More recent versions than this are available from http://www.audacityteam.org/download/ .
Audacity is free software, developed by a group of volunteers and distributed under the GNU General Public License (GPL). Programs like Audacity are also called open source software, because their source code is available for anyone to study or use. There are thousands of other free and open source programs, including the Firefox web browser, the LibreOffice or Apache OpenOffice office suites and entire Linux-based operating systems such as Ubuntu
- Record live audio
- Record computer playback on any Windows Vista or later machine
- Convert tapes and records into digital recordings or CDs
- Edit WAV, AIFF, FLAC, MP2, MP3 or Ogg Vorbis sound files
- AC3, M4A/M4R (AAC), WMA and other formats supported using optional libraries
- Cut, copy, splice or mix sounds together
- Numerous effects including change the speed or pitch of a recording
- And more! See the complete list of features: http://audacity.sourceforge.net/about/features
Great app ! Fast and easy to use !
The review below is worth repeating: "Do NOT, under ANY CIRCUMSTANCES download audacity from Sourceforge!!! They attach all sorts of malware to the download. YOU WILL INFECT YOUR COMPUTER!!!! Instead, go to the REAL audacity site: www.audacityteam.org " I spent half the night removing the large suite of nasty (and some very nasty) malware that embedded themselves deep within Windows and hijacked all browsers to the point of crippling them (with those false pop-up warnings that would not go away simply by clicking an 'x' - and I'm an electronics tech with a former computer tech cert - if you are not, then your computer is screwed. If you do not know how to quickly remove malware (including the nastiest), then don't download from this site - use the original site. Just a note - after I removed all the malware, I took a chance and manually installed the 'free' Audacity (worst case - all the malware would reinstall) - it installed OK - without the malware. I haven't tried Audacity yet - so I'm not sure if it will meet my needs, not knowing what functions and features it has - so my one-star review is a warning about this site...
You may try use Avdshare Video Converter to Convert MP4 to Windows Media Player more compatilbe video format like convert MP4 to WMV, MP4 to AVI, MP4 to MPG, MP4 to ASF.
I have used this since high school. Still super simple and easy to use.