The audio CD with the initial production run of the North American Xbox release has 21 tracks (it was originally just going to be a pre-order bonus). All of those tracks and another 11 are available for download from Kirill Pokrovsky's
website (though that still isn't the complete soundtrack).
AFAIK, the Xbox bonus CD and the Divine Divinity / Beyond Divinity audio CD available from Larian's Vault (
here) are the only physical CDs still available (the German collectors edition of D2:ED had a CD with about half a dozen tracks).
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