Using Expanders and Compressors Together?
It may sound counter-intuitive, but you absolutely can and sometimes should use an expander and a compressor together to control different aspects of a sound's dynamic range, such as removing bleed with an expander followed by a compressor for transient shaping, or using an upward expander to restore life to an over-compressed mix. The two processors serve different, often opposite, goals and can be chained to achieve complex dynamic control. The key is targeting specific aspects of dynamic range rather than the entire range itself. Key Differences: - Compressor: Reduces the dynamic range of a signal, making loud parts quieter. - Expander: Increases the dynamic range, making loud parts louder and quiet parts quieter. Common Uses for Both: - Bleed Control and Shaping: Use an expander (or a gate, a hard expander) before a compressor to reduce unwanted background noise or mic bleed from quiet sections. The compressor can then be used on the desired sound to shape its transients or add punch. - Adding Dynamic Energy to Over-compressed Mixes: An upward expander, especially a multi-band one, can be used after a mix has been over-compressed to bring back its life by subtly increasing the volume of quieter elements. - Dynamic "Pumping" Effect: A compressor can be used to level out a signal, and then an expander can be placed after it to make the louder parts of the signal even more pronounced, creating a distinct dynamic effect. How They Work Together: - In Series: You can chain them, with the expander acting first to clean up signal before it reaches the compressor. - Parallel Processing: A compressor can be used in parallel on a separate return to add colour, while the expander works on the original track, creating a more complex soundscape.