Master-buss compression applied early in the mix allows individual tracks to be balanced against the buss processing

Adding a compressor or other processing to the master bus after the mix is complete often requires significant reworking of individual track levels and EQ, because the buss processing changes how everything combines. Engaging master-buss processing early—once the rough balance is established—means all subsequent individual channel adjustments are made with the buss compression and its gain-riding behavior already active. Decisions about transient emphasis, low-end levels, and headroom are all made in the context of the final output processing. Most professionals find that this reduces rework and produces more unified results.

Examples

Master-buss compressor engaged at the start produces 3 dB of gain reduction on the most energetic moments; kick and bass adjustments are made with this compression already shaping them.

Assessment

Explain why waiting until the end of a mix to add master-buss compression can create problems. Describe the benefit of engaging it early in the process.