Just a guess
, but I think that .mp3 is the file format of choice by the vast majority of persons who indulge.
Even though the .wma format has claimed to produce smaller (no consideration, IMO) and better-sounding music files, I just find that .mp3 files provide fidelity which my ears find pleasing (and I don't really care about having smaller music files, now that larger hard drives are ubiquitous).http://wmaconversion.com/wma-vs-mp3.htm
Not an endoresement of any sort for the promoted product, just a concise summary of issue perceived by some.
More at http://www.google.com/search?hl=en&q=.wma+versus+.mp3
Something to consider: How many requests/advertisements do you see/hear about for .wma players
And...FWIW, these allusions to 64-bit .mp3 files compared to 64-bit .wma files...are unrealistic. Nobody records .mp3 files at that rate today. When I first started, even then it was considered that 128-bit was as low as one would go, with 192-bit being CD-quality in the minds of many.http://www.mp3-converter.com/bitrates.htm