I thought that it would be interesting to have a mirror and grab a light and shine it around in different ways. It's an analog to the acoustic reflections that we're going to be trying to activate as well.

Maybe I'll start from the initial idea, what motivated me to do that. In 1953, I had access to a tape recorder. Tape recorders were not widely available. There was no cassette tape back then. It was a Sears Roebuck tape machine. I put a microphone in the window and recorded the ambience.

I try to influence this improvisation in two ways. One is by centering on reflections, in both senses of the word: acoustic reflections as well as visual reflections from a mirror or surface, and then reflecting on the material in a contemplative way. The other influence is listening to the tails of the sounds that you make.

I didn't have any sophisticated equipment at all. The equipment we had in the studio at the time was not intended to make music; it was for testing purposes. So we had to repurpose all the equipment to make music. That made me try a lot of different things.

I think that this performance with the Thingamajigs is going to be an exploration of the acoustic space and particularly the vertical space, which we don't think about so much.

Listening is not the same as hearing and hearing is not the same as listening

Now, I have about twenty per hand and can change the number of delays, change different parameters, the delays to the modulations and so forth. I developed the EIS over the time period that I was just talking about [1991].