Emilie Meyer
Panning is a process in audio that involves positioning sounds at particular locations in the stereo image of a mix. This is done by adjusting the portion of a channel's signal that is sent to each output channel. For example, panning a signal to the left will send more of the signal to the left output channel and less to the right. The pan control setting determines the distribution of the audio signal. The placement of a panned source will change if the speakers are placed further apart, but the relative distance from the centre to the extreme of the stereo panorama will remain the same.
| Characteristics | Values |
|---|---|
| Panning | Determines which channel a signal goes to |
| Sends some of the left recorded channel's level to the right output channel, or some of the right recorded channel's level to the left output channel | |
| Controls how narrow or wide an instrument sounds | |
| Creates the impression that a source is moving from one side of the soundstage to the other | |
| Adjusts the portion of a channel's signal that is sent to each output channel | |
| Changes the volume level of the output channels, without redirecting the recorded signal | |
| Balancing | Adjusts the levels of the distinct channels but won't change which is left and which is right |
| Changes the volume level of the right output channel, while the volume level of the left output channel remains constant | |
| Similar to a paddle in between two streams, you can turn it to either side, slowing that stream with no impact on the other | |
| Perception | Our perception of the stereo field differs between headphones and speakers |
| Volume levels and pannings determine our perception of importance, space, and presence |
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What You'll Learn
Understanding the difference between panning and balancing
Panning and balancing are two different concepts that are often confused with each other. They both involve adjusting the audio output to create a certain listening experience, but they do so in different ways.
Panning determines which channel a signal goes to. It adjusts the portion of a channel's signal that is sent to each output channel. For example, if you pan a signal to the left, more of the signal goes to the left output channel and less goes to the right. This can be used to create a wide stereo image, but it should be used sparingly to avoid an unbalanced mix. Hard panning, for instance, involves placing sounds completely to the left or right, while LRC panning stands for Left, Right, and Center, where certain elements like lead vocals are placed in the center and others like rhythm guitars are placed to the sides.
On the other hand, balancing adjusts the levels of the distinct channels without changing which is left and which is right. It changes the volume level of the output channels, without redirecting the recorded signal. For example, if you adjust the balance dial towards the "full left" setting, the volume level of the right output channel decreases, while the volume level of the left output channel remains constant. This can be used to ensure that vocals and lead instruments sit prominently in the mix without masking other critical elements.
It's important to understand the difference between panning and balancing to create an immersive audio experience. By using a combination of these techniques, you can achieve a solid mix that enhances the listening experience and invites the listener into the heart of the music.
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How to pan audio on headphones
Panning audio on headphones is a different process from panning audio on speakers. Headphones eliminate natural crossfeed, meaning that hard-panned sounds are heard solely in one ear, and centre-panned sounds appear between the ears, inside the listener's head. This creates a 180-degree listening angle, as opposed to the 60-degree angle created by stereo speakers.
The difference in stereo perception between speakers and headphones means that panning instruments on headphones may require different decisions from panning on speakers. For example, the use of binaural panning is recommended for listeners wearing headphones.
To pan audio on headphones, it is important to first deal with the gain structure, levels, and panning. Volume levels and panning determine our perception of importance, space, and presence. Panning a signal to the left, for example, will send more of the signal to the left and less to the right.
Some mixers allow users to split deck A and B into L-only and R-only respectively on the headphone output, with an unaffected master output. This can be done by pulling the headphone jack halfway out.
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Using pan pots to position sounds
When using pan pots, you can position sounds at any point between two speakers. The pan pot controls the relative loudness of a sound in one speaker compared to the other. For example, if a sound is played louder from the left speaker, your brain will perceive the sound as coming from the left.
A pan pot is short for a "panoramic potentiometer". When the pan pot is in the centre position, the sound is played out of both speakers at the same level, creating a "phantom centre". This means that the sound appears to be coming from the centre, despite there being no speaker in the middle.
You can also use pan pots to control the width of a stereo image. For example, if you have a stereo recording of a piano, placing the pan pots hard left and hard right will spread the piano across the entire stereo image. Moving each pan pot towards the centre will make the piano's width narrower, but it will keep the piano located across the centre.
The placement of a panned source will change if you move your speakers further apart. The maximum image width is determined by the physical separation of the speakers. So, if you have a sound panned 30% to the left, it will physically be further left with wider-spaced speakers than with narrower-spaced speakers.
It's important to distinguish between panning and balancing. Panning determines which channel a signal goes to, while balancing adjusts the levels of the distinct channels without changing which is left and which is right.
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How speaker placement affects panning
Speaker placement plays a crucial role in achieving the desired panning effects. The placement of speakers in a room can significantly impact the sound quality and your listening experience. Here are some ways speaker placement affects panning:
Speaker Separation and Distance
The distance between stereo speakers, also known as speaker separation, is essential for achieving the desired panning effect. If the speakers are placed too close together, the sound waves from the left and right channels will merge near the speakers, resulting in a loss of the stereo effect. On the other hand, if the speakers are placed too far apart, you may experience a lack of clarity in the centre channel. The ideal separation forms an equilateral triangle, with the listener positioned at the apex and equal distances between the speakers and the listener. This setup ensures that you are in the sweet spot, where the sound waves overlap, allowing you to hear equal volume from each speaker.
Speaker Height and Angle
The height and angle of your speakers also influence panning. Ideally, the tweeters or smaller drivers responsible for higher-frequency sounds should be positioned at ear level when you are in your usual listening position. Additionally, angling the speakers towards the listener at a 30-degree angle is recommended. This toe-in angle ensures that the sound waves are directed towards the listener, enhancing the accuracy and clarity of the sound. Small adjustments to the toe-in angle can make a noticeable difference in your listening experience.
Speaker Placement in Relation to Walls
The placement of speakers in relation to walls and other surfaces is another critical factor. Speakers placed too close to walls can cause audio problems due to sound wave reflections. These reflections can distort the audio, boost bass frequencies, and cause phase cancellation, resulting in a muddy or unbalanced sound. To mitigate these issues, it is recommended to position speakers at least two to three feet away from the nearest wall. If sufficient separation from walls is not feasible, using sound-deadening materials such as acoustic panels or bass traps behind the speakers can help minimise reflections and improve sound quality.
Panning and Balancing
It is important to understand the difference between panning and balancing. Panning determines which channel a signal goes to, allowing you to adjust the relative volumes of the left and right channels. On the other hand, balancing adjusts the levels of distinct channels without changing their left or right designation. Both panning and balancing play a role in creating a three-dimensional audio image and ensuring that each element of a mix lives in its own space.
In summary, speaker placement has a significant impact on panning and your overall listening experience. By following the principles of speaker separation, distance, height, angling, and placement in relation to walls, you can optimise the panning effects and achieve a clear, balanced, and immersive sound.
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Adjusting the balance of speakers
At its core, panning involves manipulating the placement of sounds within a stereo image. By using a pan control or "pan pot" (short for "panning potentiometer"), you can determine how much of an audio signal is directed to the left or right output channels. This technique allows you to create the illusion that a sound source is moving across the stereo field, adding depth and dynamics to your audio mix.
When adjusting the balance of speakers, it's essential to distinguish between panning and balancing. While similar in appearance due to their left and right knobs, they serve distinct purposes. Panning decides which channel a signal goes to, allowing you to send a signal to the left, right, or both channels. For example, if you pan a signal to the left, more of it will be directed to the left speaker, and less to the right, giving the impression that the sound source is positioned on the left side. On the other hand, balancing adjusts the volume levels of individual channels without redirecting the recorded signal. This means that if you adjust the balance to the left, the volume level of the right output channel will decrease, while the left output channel's volume will remain constant.
To fine-tune the balance of your speakers, you can utilise the pan control knobs or virtual on-screen controls, depending on your equipment. By adjusting these controls, you can precisely manage the distribution of audio signals between the left and right speakers, creating the desired stereo image. It's important to note that the physical separation of your speakers also plays a role in the overall stereo image. Wider speaker placement will result in a broader stereo image, while narrower placement will yield a more concentrated soundstage.
In conclusion, understanding how to adjust the balance of speakers, or panning, is a valuable skill for anyone seeking to optimise their audio experiences. By manipulating the distribution of audio signals between the left and right output channels, you can create immersive soundscapes that captivate your audience or elevate your listening pleasure. Whether you're crafting intricate music mixes or simply seeking the perfect audio balance for your home entertainment system, the art of panning is a powerful tool at your disposal.
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Frequently asked questions
Panning is the process of positioning sounds at particular locations in the stereo image of a mix. It is done to create the impression that a source is moving from one side of the soundstage to the other.
You can adjust the pan on your speakers by using the pan control or pan pot. The pan pot has a knob labelled left and right, which determines which channel a signal goes to. As you pan to the right, you turn down the level of the left side of the signal.
Balancing will adjust the levels of the distinct channels but won't change which is left and which is right. Panning, on the other hand, will determine which channel a signal goes to.
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