 As a result, that music was locked into this ecosystem and available for portable use only through the purchase of one of the above devices,  or by burning to  CD and optionally re-ripping to a DRM-free format such as MP3 or WAV.
<meaning-changed>  As a result, that music was locked into this ecosystem and available for portable use only through the purchase of one of the above devices,  or by burning to  CD and optionally re-ripping to a DRM-free format such as MP3 or WAV.
 As a result, that music was locked into this ecosystem and available for portable use only through the purchase of one of the above devices, Is Apple Playing Fair? Navigating the iPod FairPlay DRM Controversy or by burning to CD and optionally re-ripping to a DRM-free format such as MP3 or WAV.