a while ago I posted some of my “1 harp in 2 voices”-vids here. Back then I recorded the music in the usual way with external mics (recording 1st harp, then having the playback on the headphones and recording 2nd harp).
Recently I started doing the recordings with a looper pedal. It is really good fun, and if one wants to play harp music that comes in several voices but hasn’t a second harpist at hand, it is also great for practicing!
For the harp I’m using a contact mic (gear used is in description below the YouTube-Vid). It gives you a very direct, authentic sound which helps me staying in time with myself when recording the 2nd harp.
In these Videos I use the looper: