Ann: Integration Stage Update, page-54

Naturally we are all desperate to hear the chip actually playing!

But knowing that it can transduce a digital audio signal at the quality revealed by the 3/3/15 announcement is probably all we will get until we actually get to see and hear it at something like the next AGM. The announcement you link to shows clearly that the MEMS chip has been driven, albeit by a test bed emulator, and that it can play any digital audio signal at the required quality and power to play music superbly.

I have it on personal assurance from Danny Lewin that the MEMS device works as hoped but that a final "music playing chip" will not be shown until one is produced as a commercial unit. (That should have been ready now, but as we now know is now delayed.) From the point of view of the developers not having a music playing chip is not a problem. Their testing does not need to play music, only to establish that it meets all the criteria that will allow it to do so.

In that report we got a clear thumbs up from Michael Klasco that the chip is real and AP is also for real. Mike Klasco is a name anybody in the audio industry would respect as being able to provide an independent and qualified evaluation of the tech - and that was in Feb 2015. The device has come a long way since then.

If you would be helped by hearing the early proof of concept chip there is an early video of a single chip playing Johnny Cash's "Ring of Fire". The quality is about what you would imagine from a prototype but it does prove that the DSR embodied in the chip actually works - and plays music.