• Home
  • pcDuino
  • WiKi
  • Store
  • Distributors
  • Home
  • pcDuino
  • WiKi
  • Store
  • Distributors
HomepcDuinoQuick StartpcDuino3The Definition of Audio Jack Line In of pcDuino3
Previous Next

The Definition of Audio Jack Line In of pcDuino3

Posted by: admin , October 6, 2014

Do you know that the audio jack on pcDuino3 has audio output and audio input?  That means you can record the sound using the audio jack.

1006_1

 

We can use audacity to record and playback sound. To install audacity, simply enter the following commands:

 

$sudo apt-get install audacity
$sudo apt-get install pulseaudio pavucontrol

The following is the screen capture. Please pay attention to the mic configuration.

audacity

 

 

I used the earphone from iPhone, and found that it can only hear the sound, but cannot record. But the earphone from Samsung can both hear and record the sound. It turns out that the audio jack of pcDuino3 follows OMTP standard, while Apple follows CTIA/AHJ standard.  The definitions of the two different standards are reproduced here (The original can be found at here):

Standard Tip Ring 1 Ring 2 Sleeve Phones using this Standard
OMTP Left Audio Right Audio Microphone Ground old Nokia (and also Lumia starting from the 2nd gen[17]), old Samsung (2012 Chromebooks), old Sony Ericsson (2010 and 2011 Xperias), old Wiko (2012-), PlayStation Vita and DualShock 4 PS4 controller
CTIA /AHJ Left Audio Right Audio Ground Microphone Apple, HTC, latest Nokia, latest Samsung, latest Sony (2012+), latest Wiko (2013+), Jolla,[18] most Android phones

 

Share!
Tweet

admin

About the author

Leave a Reply Cancel reply

You must be logged in to post a comment.

Category

  • Home
  • pcDuino
  • WiKi
  • Store
  • Distributors