Now that more and more documentation on the Apple Watch is surfacing has anybody found a way to access and use the device\'s microphone?
Yes, it is introduced in Watch OS 2.
But as Apple mentioned, this part of the API is in preview, and it did changed a lot. As for Watch OS 2 beta 5, the according interface(in Swift) changed to:
@available(watchOS 2.0, *)
public func presentAudioRecorderControllerWithOutputURL(URL: NSURL, preset: WKAudioRecorderPreset, options: [NSObject : AnyObject]?, completion: (Bool, NSError?) -> Void)
So please always refer to the SDK document you are using, if you want to try this new feature.
By the way, this sample project would be a good start:
https://github.com/shu223/watchOS-2-Sampler
Still, some of the API used in sample is already changed, like this recording one.