Every electric signal created by a single microphone capturing acoustic vibrations starts as a mono audio signal.
When that signal is routed through the channel of an audio console or of a digital audio workstation, the mono signal is converted to a stereo signal with two channels.
When working with computer code in Matlab, a stereo signal is represented as an array with two columns. The first column is for the “left” channel and the second column is for the “right” channel.
The process of converting a mono signal to a stereo signal in Matlab involves putting an array with one column into an array with two columns.
Next, let’s explore a more interesting and common way to do this involving the use of a panning potentiometer.