1*b7c941bbSAndroid Build Coastguard Worker<!DOCTYPE html> 2*b7c941bbSAndroid Build Coastguard Worker<html> 3*b7c941bbSAndroid Build Coastguard Worker<head> 4*b7c941bbSAndroid Build Coastguard Worker <title>Audio Calibration Info</title> 5*b7c941bbSAndroid Build Coastguard Worker</head> 6*b7c941bbSAndroid Build Coastguard Worker<body> 7*b7c941bbSAndroid Build Coastguard Worker 8*b7c941bbSAndroid Build Coastguard Worker<p>This panel allows you to set levels for loopback signals</p> 9*b7c941bbSAndroid Build Coastguard Worker<p>The process is as follows:</p> 10*b7c941bbSAndroid Build Coastguard Worker<ol> 11*b7c941bbSAndroid Build Coastguard Worker <li>Select the input and output devices on which the loopback is executing.</li> 12*b7c941bbSAndroid Build Coastguard Worker <li>Click "Left" to play a sine wave on the left channel of the selected output device.</li> 13*b7c941bbSAndroid Build Coastguard Worker <li>Use the volume control on the DUT and/or external peripheral to set an appropriate signal level.</li> 14*b7c941bbSAndroid Build Coastguard Worker <li>Repeat the process for the right channel. 15*b7c941bbSAndroid Build Coastguard Worker</ol> 16*b7c941bbSAndroid Build Coastguard Worker<p>The signal level for the Left signal should look something like this:</p> 17*b7c941bbSAndroid Build Coastguard Worker<center><img src="images/LoopbackCalLeft.png" alt="A left-channel loopback example." style="width:200px;height:150px;"></center> 18*b7c941bbSAndroid Build Coastguard Worker<p>The signal level for the Right signal should look something like this:</p> 19*b7c941bbSAndroid Build Coastguard Worker<center><img src="images/LoopbackCalRight.png" alt="A right-channel loopback example." style="width:200px;height:150px;"></center> 20*b7c941bbSAndroid Build Coastguard Worker 21*b7c941bbSAndroid Build Coastguard Worker</body> 22*b7c941bbSAndroid Build Coastguard Worker</html> 23
