VCA (Voltage-Controlled Amplifier)
Definition
A type of compressor circuit that uses a voltage-controlled amplifier to apply gain reduction. VCA compressors are known for their fast, precise response and punchy character. The SSL G-Bus compressor is the most widely referenced VCA design.
In Simple Terms
A type of compressor circuit known for being fast, punchy, and precise. The SSL bus compressor — one of the most famous mix tools in recording history — is a VCA design. If your mix needs forward energy, this is the flavor.
In Practice
A VCA bus compressor applied to the mix bus adds forward energy and controlled punch — it is the defining sound of many commercial records mixed through an SSL console.