Is there support for RealAudio / RealMedia (.ra / .rm files)?
There isn’t, and it doesn’t look like there will be in the near future. RealAudio is a proprietary format; there is no specification available to the public. Due to that, it’s hard to implement support for it. Currently, the only way to do this seems to use native libraries provided by RealNetworks. If you want to change this situation, bug RealNetworks to publish specs (politely, please).