DC Coupling is a type of electronic connection that allows the passage of both Alternating Current (AC), such as audio, and Direct Current (DC), such as control voltages (CV).

Unlike AC Coupling (which uses capacitors to block DC), DC Coupling is a direct connection that does not filter any part of the signal.

Advantages

• Pure Phase Response: Because it has no capacitors in the signal path, it avoids the small phase rotations that the AC coupling introduces, especially at low frequencies. CV Compatibility: Allows the equipment to send or receive Control Voltage (CV), which are DC signals used to control analog and modular synthesizers. Disadvantages: Risk of Damage: Any unwanted DC voltage (DC offset) present at the output of a piece of equipment can be passed on, potentially damaging the next piece of equipment or causing a harmful displacement in the cone of a loudspeaker. Clicks and Pops: Connecting or disconnecting cables in a DC-coupled system can generate loud noises (pops and pops). clicks).

CC coupling is becoming increasingly common in audio interface outputs, allowing them to be used to send CV signals from software (such as Ableton CV Tools) directly to a modular synthesizer.