05-05-2011 01:44 AM
I'm wondering whether the 3.5mm jack (headphones) is strictly an output jack, or whether it can be used as an input, as is done on the iPhone etc. I'm beginning work on another app and it could be enhanced if this can be used as an input as well.
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05-05-2011 01:47 AM
i tried using my BlackBerry's headphone/mic wire and it could only do sound from the headphone and would only listen from the device microphone -- so im guessing its not possible to do a two way thing.
05-05-2011 08:09 AM
05-05-2011 11:55 AM
I noticed a different behavior on my PlayBook while playing around with the Video Chat app.
When my headphones were plugged in I tested blowing into the device microphone and into the headphone's. No noise on the PlayBook's microphone, but on the cabled one.
05-05-2011 12:01 PM
I guess once I have my device, I can do some tests with an app to see if there is more than one mic listed, or to isolate where the sound data is coming from. Is there anywhere we can e-mail to get specific details on hardware capabilities that may or may not be available later? I guess my other option is to try and bring a signal in through usb.
05-05-2011 12:08 PM
05-05-2011 12:35 PM
@BiggerCC, you mean you heard the hiss when you blew into the headphone's microphone, but not when you blew into the tablet's own stereo mic?
05-05-2011 12:52 PM
that makes it sound as though there's a single input channel (as the API docs show), but it comes from the audio jack when you have something plugged into it (only something with microphone support?) and from the integral stereo mic when you don't.
I don't have a headset with a microphone, but if anyone does and can try a test app, it would be interesting to see what you learned if you made a test app listening to the CONNECTED_INPUT_CHANGED event and checked whether the availableInputs array changed when you plugged and unplugged the headset, as the availableOutputs list should. The API lists HEADPHONES and SPEAKERS as the possible outputs, but the only input listed is INPUT. Maybe the device itself will show something different.
05-05-2011 01:18 PM
I can confirm that the PlayBook does indeed accept input from a microphone in the jack. The headphone / microphone set from my Bold 9780 record sound to my app (which looks for the first item in the 'microphones' array).