Volume 20 in the "sound tectonics" live concert series showcasing cutting-edge music and sound art from Japan and abroad is a DJ event hosted by programmer/DJ Nao Tokui's Qosmo. Having been involved in the production of AI-based works and algorithmic design, in 2016 Qosmo launched the "AIDJ PROJECT" revolving around the development of artificial intelligence DJs with the aim to establish a dialogue between humans and AI. This time's event showcases the latest AIDJ format developed in this project, with AIDJs and human DJs alternatingly spinning tracks in the so-called "back to back" style. The human performers appearing this time are tofubeats and Licaxxx, two up-and-coming DJs who have recently appeared at various music events and festivals.