Re: wav-wma
WAV is RAW format for storing audio/speech, we can say this is the output of analog to digital conversion.
WMA is highly optimized audio/speech coding algorithm....with very very good compression ratio.Same is WMV for video, used for next gereration video application at very low bitrates.
All the Audio Coding algo such as WMA etc are applied on WAV files, also the compression ratio is calculated based input WAV file and output compressed file from the Codec.