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User Name Thread Name Subject Posted
Gray Rooster What DO Physicists Think About? (104* d) RE: What DO Physicists Think About? 07 Mar 01


Bruce, some quick notes. I had a few minutes this morning before a long session and this little break time. I decided to test first for sample interrupt recognition.

I have a sound recording device by Digidesign that is a standard in the industry. It would qualify as a lab grade testing device for most of the things I'm going to try. The sound card I'm using is another matter. It is an SB Live card and it is subject to some fields I can't isolate and remove.

However, at a sample rate of 44.1 kHz, I can disern a distict sound sample pattern interrupt difference over a four sample range. Possibly only three, but I knew what I was looking for then and remember what I said about brain noise in my last post. It SEEMS to have been there at a three sample range.

Method: I recorded a 440 Hz tone for 30 seconds and repeated this action onto three separate tracks. I then amplified each resultant randomly (with software) until all tracks reached 105dB at at least three points on the scale. I then moved one of the tracks in one sample steps around the 105 dB points until I could disern a difference. The difference being heard to me as a "click-buzz" (a non-specific to the 440 Hz test tone).

Then for grins, I looked at the resultant "click-buzz" at high resolution and analyzed the form using Fourier's method. The result was "not a note" registered at 440 Hz but a complex form did appear that had MANY attributes of MANY "notes" and this complex could be adjusted with little effort to "sound" at several nearby frequencies AND frequencies MUCH further away as a "pure tone" (frequency) mode, ie.: 336, 338, 442, 448, 650, 890.

So much to do. This suggests a chord may exist anywhere and nowhere, depending on the defined parameters of the test and the "ear" listening and judging the result. Three notes were indeed "found" in the test result, but I needed a visual cue to "see them."

This first pass at finding my ears leads me to believe I was correct in my basic assumption last post. I'm speaking on a personal bias about auditory level only. You'd really dig this if you were here.

Next pass I'll go ahead and lay down a diminished chord (less chance of pre-formed ears, more chance of brain noise), a major chord (reverse of the parens above), and a two note stack with octaves (invite the brain in).

I'm reminded of my clarinet teacher talking to his buddy in the hall back in '56 about Pete Fountain's ability to sound "non- notes" on his clarinet. The gist was "it's still music if I say it is - a note doesn't have to sound "good" to me to be right for the piece.


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