Why I am going to US?
CF stands for something called “Compensation Factor”. I am going to present such a thing at 125th AES convention.
Based on the mathematical induction, San Fransisco offers a new thing about “Influence of delay on Musical collaboration” on early Octobers of each even year. I kid you not!
- October 2004, San Francisco: Professor Chris Chafe, a multidisciplinary musician and researcher who is the head of CCRMA (The Stanford University Center for Computer Research in Music and Acoustics), published an important paper entitled “Network time delay and ensemble accuracy: effects of latency, asymmetry” on 117th AES convention. It was in San Fransisco, not that far from to his office, where he proposed his counter-intuitive “Chafe Effect”:
In a musical interaction short delays may produce a modest, but surprising acceleration. So, moderate amounts of delay are beneficial to improve the collaboration, keeping the tempo stability.
- October 2006, the same place: Right two years later Snorre Farner confirmed this observed effect and tested it in various situations with his “Ensemble hand-clapping experiments under the influence of delay and various acoustic environments” on 121th AES. He was a postdoc at our center of excellence (Q2S) who is now a Researcher and developer at the Analysis/Synthesis group at IRCAM in Paris (and also a material and electrochemistry scientist based on his backgroud!). This job was done under the supervision of Peter Svensson, an acoustician who is a professor both in electroacoustics and our Q2S center. He is now my supervisor.
- October 2008, again San Francisco: It’s my turn! I am going to the states to try my chance to add another brick in the wall I continued that way and published a paper in the same convention, but more focused on the strategy people take while collaborating. I used Snorre’s dataset to analyze but I chose another approach. This recent paper is called “Quantifying the Strategy Taken by a Pair of Ensemble Hand-Clappers under the Influence of Delay” and is going to be presented as a poster in the session Listening Tests & Psychoacoustics of 125th AES, on Friday October 3, 2:30 pm – 4:00 pm. In this work Peter, Snorre, and I, have presented a quantifiable strategy factor called “Compensation Factor (CF)”:
While two persons are clapping a rhythm together with a certain delay, each can take a strategy between two extreme cases: Feeling free and let the arms be synchronized with the ears (the lazy strategy which decreases the tempo), or Bothering themselves to clap earlier – as much as needed – than what is supposed to come from the other side (the less synchronized strategy which keeps the tempo stable). At each moment of a clapping trial the strategy taken by performers is something in between of these to extreme cases. We call this trade-off “Compensation Factor”.