Future Audio Workshop has released a free update (1.0.3) for their Circle Synthesizer. It’s now possible to add your own waveforms by using the "Circle Wavetable Generator"!
Synth: FAW Circle 1.0.3 Circle Circle Modulation Circle Review Circle Synth Circle synthesizer Circle Update Circle Wavetable Generator Cirlce 1.0.3 Custom Wavetables Future Audio Workshop Future Audio Workshop Circle subtractive semi-modular Wavetables
Artist site: http://www.markmoshermusic.com
Host of Sonic Encounters Podcast: http://markmoshermusic.com/podcast/.
Boulder Synthesizer Meetup founder and host: http://www.bouldersynth.com