I would like to welcome to all ACTOR members to the workshop wrapping up our fourth year of activities. As we transition back to some form of normal life again, many of the collaborative workgroups have been very active, demonstrating once again the resourcefulness and devotion of our community to our common passion.

I would like to welcome to all ACTOR members to the workshop wrapping up our third year of activities. I sincerely hope that all ACTOR members managed to maintain their research and creative activities in spite of the continuing pandemic. Many of the collaborative activities of course have been virtual and yet again this year's workshop is online. In spite of these challenges, many of the collaborative workgroups have been very active demonstrating once again the resourcefulness and devotion of our community to our common passion.

The first Timbre and Orchestration Taxonomies Workshop was held virtually 29–31 May. Over the first two days, participants gave presentations using Maurice Ravel’s Alborada del gracioso as the shared reference for each method. This pluralistic approach brought up engaging questions and facilitated discussions about the unique qualities of each taxonomic system. The third day was devoted to group discussion and proved to be intellectually stimulating and invigorating for all.

I would like to welcome to all ACTOR members to the workshop wrapping up our second year of activities. I hope that all ACTOR members managed to maintain their activities in spite of the challenges presented by the pandemic. Many of the collaborative activities of course had to go virtual as did this year's workshop, but everyone rose the challenge as best as circumstances allowed, and this year's slate of workgroups is a testament to the resourcefulness and devotion of our community.