An analyst with JupiterResearch claims that DRM, variable pricing, and digital bundling are all key issues in Apple’s negotiations with the recording industry. On his weblog, analyst Mark Mulligan states that “It’s unlikely that they’ll get UMG, WMG and Sony BMG to echo EMI’s move [to offer DRM-free tracks], but Apple must be hopeful of gaining at least some concessions from one or more of them across at least some portion of their…