The blog posts of this section relate to the courses MCT4024 Physical-Virtual Communication and Music 1 and MCT4025 Physical-Virtual Communication and Music 2 (from 2021), and to the discontinued courses MCT4021 Physical-Virtual Communication and Music 1, MCT4022 Physical-Virtual Communication and Music 2, and MCT4023 Physical-Virtual Communication and Music 3 (2018 to 2021). These courses aim to provide theoretical and practical knowledge on advanced audio-visual systems for online synchronous musical collaboration and hybrid communication settings. The students also learn to operate, maintain and experiment with the physical-virtual Portal, a laboratory for network-based musical communication.