Hi, and welcome to something I hope is helpful to you — some simple testing of audio plugins which you can use for comparing, or just to find out more about each one. Plus some things to help with your recording and mixing!
There are times we want a vocal to sound more “airy”. Usually we reach for an EQ or multi-band compressor. But the “Whispering Delay” method is more selective and offers greater control in how much “airiness” we add and where it occurs in relation to the signal.
Lindell doesn’t actually produce a hardware version of this, but they developed the plugin (along with LSR). So here you have it, Plugin Alliance Lindell SCR, based on the API 2500.