Hot answers tagged music
From this article: Music encoded as 256kbps AAC files first came to the iTunes Store in 2007 with the launch of Apple's iTunes Plus. That marked the debut of DRM-free music tracks encoded at a higher quality bitrate that Apple claims is virtually indistinguishable from the original recordings. As of 2007 the audio files sold in the iTunes store have ...
Go to Settings → Cellular (Mobile) and switch Music off.
The circle means the song exists on the device but does not exist in your current iTunes library. You need to either import them again from CD into your library or transfer them from your device.
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