Groups and Buses

Summing tracks into a bus, or tying their controls together, so a mix can be shaped in fewer, clearer moves.

Related

BusCompressorSidechain

Grouping ties the controls of several tracks together; a bus sums their sound. The first manages actions, the second manages signal.

The problem

Compressing and EQing every track separately makes the whole mix crowded and inconsistent. Summing drums, vocals or strings to a bus first lets you process them as one thing, saving plug-ins and keeping a common tone.

How it works

A group affects control only, such as moving or muting tracks together; a bus actually adds the signals. Buses can run in series or parallel. A reverb return is another kind of bus, where all sends meet. Gain staging must be right first, or bus compression only squeezes an already overloaded sum.

Settings and judgement

Keep bus compression light, with one to three dB of movement. Use EQ to see overall masking, not to fix single tracks. Parallel compression keeps transients. The usual order is EQ, compression, saturation, but trust your ears.

What to listen for

A compressed drum bus makes kick and bass sit closer; a compressed string bus smooths the roughness of unison. The demo is an ensemble timbre, so hear the whole first, then ask whether it should be compressed.

Common misunderstandings

More buses is not more professional; deeper hierarchies are harder to troubleshoot. Bus compression cannot rescue a bad balance; it only flattens the problem.

Sources

• 编组、总线与发送的信号流，依通行调音台与 DAW 文档核查，未抄文本
• 总线压缩、并联压缩与增益结构的用法，依混音教材核查，未抄文本

Used for fact-checking only; all prose is original.