Welcome to episode 31 of Source Of Uncertainty. In this episode we got the opportunity to talk with David Kean about his time working, and being friends with Don Buchla. He commissioned a few modules (255, 297, 299) that eventually led to Don developing the 200e system. We then dig into the byproduct module that came from these commissions, the Duophonic Pitch Class Generator Model 260e.   Show notes:  Hello: 0:00 David Kean Interview: 22:00 260e Exploration: 1:31:00 Goodbye: 2:18:00 For more information about David Kean’s Ondes Martenot recreation, the Ondea. Visit: https://www.ondesmartenot.com/  Purchase Robert’s music at: https://robstand.com/  Purchase Kyle’s music at: https://darksparkler.bandcamp.com/  Listen and subscribe to Podular Modcast: https://podularmodcast.fireside.fm/ Listen and subscribe to The Deerhorn podcast:  https://thedeerhorn.podbean.com/  Listen and subscribe to Cosmic Tape Music Club podcast: https://podcasts.apple.com/us/podcast/cosmic-tape-music-club-hosted-by-the-galaxy-electric/id1550827261  Subscribe to Waveform Magazine: https://www.waveformmagazine.com/ Get your source of uncertainty t-shirts at http://sourceofuncertainty.threadless.com/  Support the show and get access to exclusive videos and audio content through Patreon: https://www.patreon.com/sourceofuncertainty Our YouTube channel: https://www.youtube.com/c/SourceOfUncertainty  Find us on Instagram @sourceofuncertainty  Contact us at sourceofuncertainty.audio