
You have to consider that by the time it reaches your right ear, your head has masked the sound in some way, further distorting the signal in a way that is more tonal. The difference in intensity between the sound reaching your left ear and your right isn’t simply a matter of volume alone. If there is more of the same guitar coming from the left channel than the right, our brains will localise that as further to the left whether we are monitoring on speakers or headphones. Simply having a higher intensity of the same sound coming from one channel to the other, localises it as such. This is quite simple and easy to simulate on either headphones or speakers. How we localise sound in the stereo field Interaural Intensity Difference How would you make something sound like it’s coming from the left if you only had one speaker directly in front of you? You couldn’t. In music, we use the left and right configuration of stereo as to create a three dimensional sound stage which would be impossible with just a single channel (mono). Stereo or stereophonic sound is the reproduction of sound using two or more independent audio channelsĬouldn’t have said it better myself. That’s how we know it came from in front of us. When a sound comes from in front of us, it reaches both ears at the same time and at the same intensity. This makes sense as that’s how it works in the real world. As our ears hear the same thing from either side at the same volume and at the same time, our brains localise that as centre. Mono information in a stereo environment equals centre information. It’s technically still mono information, but that same mono signal is now sent both to L and R.

When we have a mono signal in our DAW, eventually it gets sent to a stereo bus. When you record a vocal into your DAW using one microphone and one channel on your interface, that is mono. Mono (short for monophonic) means one channel of audio.

Many thanks to Aliki Rodgers for his contributions. So I thought I would clarify some things. I find there to be many misconceptions in understanding stereo.
