Mixedrealitytoolkit-unity: MicStream error on MicStartRecording

[onsterion]

Hi All,

Im testing the MicStreamDemo , works perfect in Windows PC but in Hololens when i try to use:
"CheckForErrorOnCall(MicStream.MicStartRecording(SaveFileName, false));".

I have this error:
"Exception thrown: 'System.Runtime.InteropServices.SEHException' in Assembly-CSharp.dll
An exception of type 'System.Runtime.InteropServices.SEHException' occurred in Assembly-CSharp.dll but was not handled in user code
External component has thrown an exception. "

And in the "outputPath = MicStream.MicStopRecording();" I receive: "YouArentRecordingRightNow"

Unity Version: 2017.1.1p1 x64
Hololens System: Full updated 09/19/2017

Any suggestion?

Regards.-

[StephenHodgson]

Just FYI, that dll hasn't been well maintained and I'm planning on removing it from the core MRTK.
I don't believe it's passing WACK compliance at the moment.

See https://github.com/Microsoft/MixedRealityToolkit-Unity/issues/987

[Ziugy]

@StephenHodgson do you have, or know of, a replacement for the microphone input if you remove it?

[StephenHodgson]

@Ziugy No. But a lot of that stuff is written into unity already. I don't mind keeping it, but it needs to pass WACK to keep included.

[onsterion]

Thanks StephenHodgson for the quick response.

[joekellyms]

Unity's Microphone class is a lot more limited than the plugin. Getting it to pass WACK would be much preferred to removing it.

[StephenHodgson]

@joekellyms, yeah I agree but getting PRs addressed and updated in the main toolkit seems impossible.

When it passes WACK again, we will move it back into the core toolkit.

[tberthin]

Hi @StephenHodgson
I'm in the same situation as @onsterion, same versions, same error (I tried multiple versions actually, without success) and I don't find any other way to record microphone input from Hololens, would you have a solution or a hint about how to do this ?
Should I try from MicStartStream (which works apparently), from source code or am I missing something ?
Thank you.

[StephenHodgson]

Well, I know this doesn't help, but I've got plans on removing this from the core toolkit cause it isn't passing WACK.

[tberthin]

@StephenHodgson Could it be possible to access data from MicStartStream (since variable "keepData" is described as "If true, all data will stay in the queue,...") without modifying MicStreamSelector.cpp (because I don't feel being able to) in order to record that data ?
Sorry for insisting I'm a bit confused failing to record that mic.

[davidkline-ms]

I experience this when i do NOT have the Music Library capability set. If I enable the bit, the application works as expected. The simple fix is to enable Music Library capability.

I am also filing an issue on the plugin that the native code side does not appear to be doing the right thing.

[keveleigh]

Fixed via #1670 and Microsoft/MixedRealityToolkit#131

[StephenHodgson]

We will close these once they make it into the release master branch.