Right from the time you make the purchase, you will be offered a free download to at least get you started while your CD arrives, which I might add contains MP3 recording in 320 Bitrate.

I'm wondering whether the phrasing "your CD arrives" is correct here? The point is that you order a CD and wait for it to come to your house, buy before it comes you can download a free sample and listen to it while waiting for your CD.
I don't see any problem with "your CD arrives" but I would very much prefer "until" in place of "while". That said, I believe this usage may be common in some English dialects.
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Yes, Ivanhr is right. "until" is a lot better.