trueplay for Android?

I can only suggest you replace your Sonos with a system that provides you with a hardware controller if you feel that strongly about it.

I probably will move on at some point but that was not the point here. I was only pointing out that a dedicated controller provides better opportunities to introduce new functionality without the unintended consequences caused when you become too dependent on third party hardware that has issues that are outside of your control.

I was only pointing out that a dedicated controller provides better opportunities to introduce new functionality without the unintended consequences caused when you become too dependent on third party hardware that has issues that are outside of your control.
But, as already noted, this ignores the counter-argument that one's then hostage to reduced R&D investment, higher component cost, and (over-)extended life cycle due to being a small player in a commoditized mass market of such touchscreen devices. I was originally a fan of the CR100, less so of the CR200 (notwithstanding its touchscreen faults), and IMO Sonos made absolutely the right decision to ride the wave of smartphones and tablets.

Back to the original point: (currently) no TruePlay functionality in the Android app.
Possible options to rectify this shortcoming:
1. SONOS built or spec'd controller. SONOS would already have considered this. Given the damage to their until then flawless reputation plus the ROI (Return On Investment) probably being -ve this is a non-starter.
2. Commission one or several top segment Android device operators to include a "standard" microphone and audio codec into their product will cost the proverbial arm and a leg and would fail the ROI test. Also other manufacturers would bleat "cartel formation" leading to financial and reputation damage. Thus a non-starter.
3.A SONOS TruePlay tuning microphone with the( necessary audio codec?) included in the Android controller. As mobile phones (and tablets?) have a jack plug wired for both incoming and outgoing audio for hands-free phone calls and as it should be easy and cheap to build a suitable microphone into a really small jack plugged device. OK, OK, so Apple doesn't need it but you do want TruePlay don't you? Slightly clunky solution but workable.
4. SONOS are already working on an elegant solution which they will release when it is ready. This is probably the real world solution currently in progress.

NeillJ, best post I've seen on here in ages, I wish everyone here was as logical as you!

Bluetooth has pretty indifferent audio quality, and BT microphones tend to be aimed at the human vocal range. Can you identify any quality microphones with a decent frequency response covering the entire audible spectrum?

I think quality is not that important. The microphones that Apple uses in their product are not exactly high quality microphones either. More important is that Apple is only using 12 different microphones across all their products. This allows Sonos to compensate for non-linear behavior. As long as Sonos can identify the microphone, they can make it work. This is also the main reason why Sonos is not supporting Android. You can find thousands of different microphone types in Android devices. It is easy to measure the 12 Apple microphones, it is impossible to keep up with the Android microphones.

NeillJ's response is excellent.

Solution 3, a Sonos microphone to plug into an Android device would be acceptable, if somewhat clunky, as Neli points out.

What is important is that Sonos address the issue without delay.

NJSS

Without delay? You mean rush some half-baked badly thought out idea to market that doesn't work properly? I'd rather they took their time and got it right.

World Phone Market Share 2015

IOS:: 11.90 %

Android: 84.60 %

You would think that Sonos would find a way !!!

Somebody needs to read the thread.

I had read the thread - my reply still stands.