Explanation of Audio Mixers
Understanding Mixing Consoles for Beginners
Mixing consoles are complex devices with a wide range of capabilities. This article aims to provide a basic explanation of how mixing consoles work, catering specifically to beginners in the field of audio technology.
Different Types of Mixing Consoles and Their Applications
There are three main models of mixing consoles:
- Audio recording consoles
- Live sound mixing consoles
- DJ mixing consoles
Mixing consoles serve various purposes, including:
- Connecting equipment to power amplifiers or recorders
- Mixing multiple audio sources into a single stereo or surround signal
- Amplifying microphones
- Distributing signals to different devices or speakers
- Routing audio sources to multi-track recorders or sound cards
- Applying sound manipulation techniques such as equalization and compression
- Adding sound effects or controlling external effect processors
Determining the Number of Channels for Your Mixing Console
The number of input channels on a mixing console depends on the devices you need to connect. It is advisable to choose a console with slightly more inputs than you currently require to accommodate future expansion. For example, if you plan to connect two CD players and a microphone, a mixer with two stereo line inputs (or four mono inputs) and one microphone input would suffice. However, having a few extra options is always beneficial in case you need to connect additional devices later on.
Understanding Subgroups on a Mixing Console
In modern studios, separate preamps are increasingly used for their superior quality. These preamps can be compared to individual channels on a mixing console but with exceptional sound quality and additional control options. They often feature extended equalization sections, compression/limiting capabilities, and functions like de-essing. If you only record one track at a time in a home studio, investing in a standalone preamp instead of a complete mixing console can provide better sound quality and cost-effectiveness.
Understanding Aux (Aux
Subgroups play a crucial role in the functionality of mixing consoles. They allow you to route specific signals to different outputs. For instance, if you have an eight-input sound card and want to record different sounds on each input, you can utilize subgroups. While not all situations require extra groups, some consoles offer “direct outputs” that are useful for recording purposes, providing an output per channel. The diverse possibilities of mixing consoles make them versatile tools for various scenarios.
Differentiating Microphone Signals from Line Signals
One common issue beginners face is connecting microphones to line inputs, resulting in excessive noise. This problem arises because microphone signals are much weaker and require preamps for proper amplification. Mixing consoles typically have built-in preamps for microphone inputs, which are essential for achieving a clean signal. Microphones are usually connected using XLR connectors, identifiable by their three contacts in the middle of the round connector. However, some older or cheaper mixers may have microphone inputs that work with regular jack plugs.
The Role of Preamps and Microphone Preamps
In modern studios, separate preamps are increasingly used for their superior quality. These preamps can be compared to individual channels on a mixing console but with exceptional sound quality and additional control options. They often feature extended equalization sections, compression/limiting capabilities, and functions like de-essing. If you only record one track at a time in a home studio, investing in a standalone preamp instead of a complete mixing console can provide better sound quality and cost-effectiveness.
Filipe Silva
January 7, 2024 @ 10:39 am
I’m excited to finally understand what audio mixers are all about!