The channel is the basic ‘unit’ of the mixer. This mixer is a simple 20 input to stereo output design. The map above shows which part we are referring to. Pretty simple, eh? But what do all those controls do?īelow is a simple summary of what the different controls of a mixer do. So at its simplest, a mixer allows the user to take lots of audio sources and manipulate them before sending them to output channels. If it said 24:2, this would mean it had no bus outputs. For example, a 24:8:2 mixer would have 24 inputs, 8 output buses, with a stereo (2 channel) master output. Many mixers describe their input-output functionality with a 3-number descriptor. These assignable outputs are usually termed buses or group outputs.
As a result, some recording desks may have as many outputs that can be routed to as they have inputs. In a studio situation, this might involve taking inputs from microphones or other sources in a live room, and directing them towards the inputs of your recording rig (which could be a computer based set-up with scores of inputs). So, at its most simple, this might involve taking the audio from performers in a live situation, tweaking and adding effects, then combining these to a stereo or mono output which can be amplified with a PA system.
Put simply, a mixer (sometimes known as a mixing desk, mixing console, mixing board, desk or console) takes various audio sources through its multiple input channels, adjust levels and other attributes of the sound, then usually combine them to a lesser number of outputs.
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