If you didn’t take the opportunity to get in touch with the Canadian Electroacoustic Community when I mentioned it a while back, you have missed out on some unusual, sometimes unsettling, music. Here’s more reasons to write. Daniel Scheidt is a computer composer, using software as an instrument to perform on, and perform with. Through techno-wizardry that I frankly don’t care to understand, he makes the computer interactive with percussionists, singers and all sorts of musicians’ input. This is not pre-programmed “hearts of space” stuff, but truly daring, ever-changing adventures in the outside possibilities of sound. Some pieces skirt the edge of melody, like Obeying the Laws of Physics, which pits a percussionist against a program of synthesizers, creating sounds and changing the drum sounds in ways that are probably as surprising to the player as the listener. Another Norm ’n George pits a trombone player against a hard disc and computer operator in a most remarkable, if sometimes dissonant, improvisation. Most unusual is a program that generates a highly developed, yet completely fictitious language, a story to be told for its emotion instead af its content. These are strangely beautiful compositions at times, not “relaxing” but very challenging. Action/Réaction is a truly collaborative effort between the composer and five musicians, and must be heard.