The sample download looks like 128k to me. But the previews look like 40k. So I imagine the full downloads are 128k wma which is pretty good. Here are a few things i saw in their FAQ:
What do I do if I accidentally delete a song from my computer that I purchased from Walmart.com?
If you accidentally delete the song file from your computer, you can download it again (up to 3 times to the same computer). If you exceed the maximum number of downloads, you will need to contact one of our Customer Service associates by sending an email to
musicdownloads@walmart.com, or by calling 1-800-222-8132 from 7 a.m. to 7 p.m. (CT), 7 days a week, who will determine if it is possible to restore the song file.
I had to reinstall system software on my computer. After restoring the music files, I found that they wouldn't play. What should I do?
You restored the music files but did not restore the license files that are required to play the music. You will need to contact one of our Customer Service associates by sending an email to
musicdownloads@walmart.com, or by calling 1-800-222-8132 from 7 a.m. to 7 p.m. (CT), 7 days a week. They will determine if it is possible to restore the license file.
I bought a new computer. Can I transfer music downloads from Walmart.com to this new computer?
WMA files protected by Digital Rights Management (DRM) encryption cannot be transferred from computer to computer. If you want to play music you downloaded from Walmart.com on another computer (or on any other device that plays audio CDs) you must burn your music onto an audio CD to play it (please note that you may burn a song to a CD up to 10 times).
How many times can I burn a song onto a custom CD?
You are licensed to burn a song to a CD 10 times. If you try to burn a CD after that, Windows Media® Player 9 will deliver a message indicating that you are not licensed to make any more burns to a CD.
What do I need to transfer songs to a portable player?
You need a WMA-compliant portable player that supports DRM. Not all MP3 players will play music that you download from Walmart.com. Please refer to the documentation that came with your player to determine if it is compatible.