zhimiaoli

.markdown-body {
    font-size: 14px;
    line-height: 1.6;
}
.markdown-body > *:first-child {
    margin-top: 0 !important;
}
.markdown-body > *:last-child {
    margin-bottom: 0 !important;
}

stephencelis

#import "SCListener.h" // Remember to link to AudioToolbox.framework.

// Start listening.
[[SCListener sharedListener] listen];

// Retrieve the average power.
[[SCListener sharedListener] averagePower];

// Retrieve the peak power.
[[SCListener sharedListener] peakPower];