Nellymoser Asao
The Nellymoser Asao codec is a proprietary single-channel (mono) format optimized for low-bitrate transmission of audio. – according to the Multimedia Wiki
This format was once widely used in Macromedia (now Adobe) Flash files and currently is the only sane codec for encoding from microphone at the user.
For a long time there has been no support for this outside the Flash Player, thus people went as far as offering bounty for writing a decoder.
Now a few weeks ago someone took the nelly2pcm code and ported it into FFmpeg. Still not committed in its current state as Benjamin Larsson discovered it can be implemented with reusing much more code from the framework.
Also the codec is used with some changes under different names (information based on an old email), we have to get a view of those samples.
It will be available once the required changes are done. We can thank already the maintainers for their picky attitude about quality.
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