During the seminar (PTG K.C., 2011) he only used the spanner tool in setting the very first 12th, and then for a few troublesome intervals later on.
I'm glad you chimed in. I was at the Stopper seminar where he taught the aural sequence as well.
I must admit at that time my brain was a bit overwhelmed and the actual protocol of setting of the temperament somewhat, but not totally escapes me. I use the software to set it. Over the last couple of days, I've been looking at the chart he provided, trying to remember what he was doing. I'm still at a loss to remember clearly what he was doing.
A4-D3 forms the first defining P12,set with his 12th spanning gizmo(just a piece of wood shaped to hit the 12th simultaneously). Then as he moved through the sequence he broke it down into 2 parts:
part 1 moves from the original P12 by fifths and octaves when available till you reach G#3.
part 2 starts with D4 ( I assume??? taken as the 3rd note of the D3,D4.A4 3 note combination) and again moves through a 5th/octave sequence till it ends on D#.
Closing the temperament circle was not presented as as important as other temperament sequences..but I'm could be remembering this fuzzily.
My recollection, and this is the interesting part to me, and the part that I took to heart, is he used 3 note simultaneously sounded combinations to set a single string of each new note at its "quietest" spot in relation to the other 2 open unison notes of the 3 note combination. He definitely used this 3 note combination outside the temperament,but I think
inside the temperament he used it as well to set each new note.
That technique was to set each new tone in the progression, notice the word set not check, but set each new note in relation to a 3 note simultaneously played combination. For example the 1st note in the sequence after the initial A4-D3 P12 as tuned open unisons was a single string of A3. This was set by playing the 3 notes A4,D3,A3 together, setting A3 in the place where the beat masking became apparent.
My recollection was that this 3 note tuning was the essence of the entire procedure...I think both inside and outside of the temperament. But!!!! I'd like to hear if that was your recollection, or what your recollection was...to see if I totally missed it.