In fact, WMA is the name of a series of audio codecs which include 4 sub-formats:
WMA: a common lossy audio format to compete with MP3.
WMA Pro: a lossy codec that supports high-res audio.
WMA Lossless: a lossless audio codec that competes with Dolby TrueHD, APE, FLAC, ALAC, etc.
WMA Voice: a lossy audio codec that competes with Speex for low-bandwidth, voice playback applications.
As you can see, WMA Lossless is indeed a lossless audio format. Some people may wonder the comparisons between WMA Lossless and FLAC. From the quality perspective, there is no difference between the two formats. Both of them are losslessly compressed audio data without sacrificing the original quality. But FLAC is more popular and universal among different system platforms and devices, which is the reason why many people tend to convert WMA files to FLAC format. In the following, we will go over simple methods to convert WMA to FLAC without loss of quality. Just read and follow.