4 Steps to Get a Breathy Vocal Sound Like Julia Jacklin
Use a large-diaphragm condenser mic Place a Neumann U87 or similar six to eight inches from your mouth. This type of mic captures the air and detail needed for a breathy tone.
Angle the mic slightly off-axis Point the mic above or to the side of your lips, not directly at them. This reduces harsh sibilance while allowing the proximity effect to add warmth.
Always use a pop filter Breathy vocals push more air at the diaphragm. A pop filter prevents plosives from ruining your take.
Add a gentle high-shelf boost in the mix A small boost around 8-10 kHz can exaggerate the breathiness. Keep it subtle to avoid harshness.