RealAudio

sound quality

visuals

browser issues

Browser requires the RealPlayer plug-in. Fortunately, this is often already found in Navigator and Internet Explorer installations.

Playback can't fast-forward or rewind (except to the very start), unless you're using the RealAudio server software (see below).

authoring issues

The RealAudio Encoder is required:

At the lowest music-capable bitrate, 16Kbits/sec, RealAudio provides three options for compression:

At 32Kbits/sec, RealAudio offers a stereo encoding not available in Shockwave.

server issues

Special server software is not required, but you get a more reliable connection if you use RealAudio server software.

security issues

Title, author, and copyright of the music are encoded in the file.

more online info

http://www9.real.com/solutions