One thing I got thinking of was gently lowpassing sounds, distorting them (very soft clipping), and then lowpassing them again, like a pre-tone and post-tone for the distortion.
One thing I got thinking of was gently lowpassing sounds, distorting them (very soft clipping), and then lowpassing them again, like a pre-tone and post-tone for the distortion.
This. And what helps to create that hollow, deep sound as well is to put a EQ on the pad's channel, and then give a boost on the fundamental (or any secondary) frequency, with a narrow Q.