Both Windows Media Audio Lossless and FLAC (Free Lossless Audio Codec) use lossless compression to reduce file size without compromising quality. WMA Lossless is a patented Microsoft lossless audio codec, while FLAC is open-source. Both have similar compression ratios, but FLAC is more robust technologically. Converting codecs is necessary for certain MP3 players that support FLAC only. WMA Lossless can be converted to FLAC without any loss of quality.
By using avconv utility we can convert .wma to .flac without any loss.
The avconv utility is provided by the libav-tools Install libav-tools package (starting in Ubuntu 12.04).
sudo apt-get update && sudo apt-get install libav-tools
avconv -i <input-filename.wma> <output-filename.flac>
