WMA is Windows Media Audio. WMA is a new audio format developed by Microsoft well known as MP3. With a higher rate in files compression and better sound quality than the latter, even far beyond those of RA. 

To convert mpa to wma, you do not install the extra mpa decoder based on DirectShow on your Windows system.

Download WMA Converter which can convert mpa to wma file. Select an mpa file, set the start time, the end time or audio encoding bitrate if needed. The bitrate is bigger, the file size is bigger, the audio quality is higher, and vice versa. Click the Convert button to convert mpa to wma.

AMR means Adaptive Multi-Rate. AMR is an audio mainly applied to mobile devices. With relatively high compression rate, it makes good effect in voice call. AMR ringtone format is one of the universal file format adopted by MMS ,which could not only be used to create music files but also produce some audio works like funny voice, animals’ voice, etc. Besides, AMR is declared as the most widely used voice standards in mobile communication system by the European Telecommunications Standardization Committee. AMR also has been selected as the broadband standard speech codec of the 3GWCDMA and GSM by 3GPP (3rd Generation Partnership Project).

To convert amr to wma, please install its decoder.

AWB format is called True Tones. AWB is firstly adopted in NOKIA3300 in the form of ringtones and it is said to be able to simulate natural sound effectively by NOKIA. AWB is affirmative that its size is quite small with a 4-minute-long song only taking up 600 to 700KB, thus AWB may be said to be the upgrade of AMR. But actually AWB is less able to restore the natural music than some other formats sound do like MMF, MP3 and so on.

To convert awb to wma, please install its codec or HDX4 player.