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Contributor
Posts: 38
Registered: ‎06-07-2010
My Device: BlackBerry Bold 9790
My Carrier: none

Re: Audio.isHeadsetConnected() always false on OS 7.0 devices

Here's what I just got from the manufacturer:

 

dongle_OutputWaveform.PNG

 

It is the mic output driven circuit of the dongle I am using. I hope you can make use of this.

Retired
Posts: 856
Registered: ‎07-15-2008
My Device: Passport
My Carrier: Bell

Re: Audio.isHeadsetConnected() always false on OS 7.0 devices

I've passed all this on to one of our Audio Engineers for review. I'll let you know what I get back from them, and what resolution options we have.

Tim Windsor
Open Source Technical Lead
Contributor
Posts: 38
Registered: ‎06-07-2010
My Device: BlackBerry Bold 9790
My Carrier: none

Re: Audio.isHeadsetConnected() always false on OS 7.0 devices

Thank you very much!

Contributor
Posts: 38
Registered: ‎06-07-2010
My Device: BlackBerry Bold 9790
My Carrier: none

Re: Audio.isHeadsetConnected() always false on OS 7.0 devices

Hi Tim, do you already have any news from the Audio Engineers?

Retired
Posts: 856
Registered: ‎07-15-2008
My Device: Passport
My Carrier: Bell

Re: Audio.isHeadsetConnected() always false on OS 7.0 devices

I apologize, I wasn't able to look at this very much with the BB10 Jam conference.

 

This is the response that I got from the audio engineer:

 

The schematic provided is incomplete, as Left, Right and Mic are left open, what they are connected to will impact detection; I am assuming it is an active circuit of some sort. The 200nF caps on L and R will cause us issues.

To form a LPF, the designers of this dongle should not rely on the output impedance of the headphone amp but implement differently; I am speculating given the diagram attached off course.

 

In short, please provide:

-          Complete schematic

-          Sample for us to look at

Tim Windsor
Open Source Technical Lead
Contributor
Posts: 38
Registered: ‎06-07-2010
My Device: BlackBerry Bold 9790
My Carrier: none

Re: Audio.isHeadsetConnected() always false on OS 7.0 devices

Thank you for the response, I'll forward it to the manufacturer.