I want to convert a .wav file to .wma (or .mp3) on Windows Phone 7 Mango.
I want to save a recording from the microphone and use the SaveRingtoneTask so I can save it as a ringtone.
How can I convert the file on Windows Phone 7 so I don't have to use a web service?
If it can't be done on the phone does anyone know how to convert it and trim it down to 40 seconds?
I ended up using this example http://www.codeproject.com/KB/audio-video/MP3Compressor.aspx and stripping out everything but the .mp3 convertions.
MasterMastic
Have a look at Windows Media Audio compressor.
来源：https://stackoverflow.com/questions/7642314/convert-wav-to-wma