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Linux 3.4 Released
jrepin writes with news of today's release (here's Linus's announcement) of Linux 3.4: "This release includes several Btrfs updates: metadata blocks bigger than 4KB, much better metadata performance, better error handling and better recovery tools. There are other features: a new X32 ABI which allows to run in 64 bit mode with 32 bit pointers; several updates to the GPU drivers: early modesetting of Nvidia Geforce 600 'Kepler', support of AMD RadeonHD 7xxx and AMD Trinity APU series, and support of Intel Medfield graphics; support of x86 cpu driver autoprobing, a device-mapper target that stores cryptographic hashes of blocks to check for intrusions, another target to use external read-only devices as origin source of a thin provisioned LVM volume, several perf improvements such as GTK2 report GUI and a new 'Yama' security module."
You don't need it for music playback, but it can become noticeable when playing games.
...that is, it will become noticeable when playing games in the distant future, when Linux actually has games.