Disklavier

I think I am missing something here  MIDIman now "M-Audio" company only makes interface devices - NOT audio to midi converters - as far as i know, there is no such thing as a streaming audio to MIDI converter device, that would be impossible unless there was only a single instrument playing, then an algorithm could be made to convert frequency to note, even then I would have my doubts about its tracking ability especially during complex chord playing..

so please inform me what this questioning and subject is about - i dont want to miss anything here...

Thanks,
Richard,
Phoenix