Compression bitrate.
This value is in bits/second, e.g. 128000 would be 128 kbps.
// Prints the bitrate of the imported audio files
class BitrateLogger extends AssetPostprocessor {
function OnPreprocessAudio () {
var audioImporter : AudioImporter = assetImporter;
Debug.Log(assetPath + " - " + audioImporter.compressionBitrate + " bits/second");
}
}