I'm hoping that someone, maybe Ark, could help me to understand the theoretics behind The Law of Octaves as it is presented in ISOTM. I've been reading the pages 123-125 over and over again, trying to understand it precisely, but I'm kind of stuck at a few points that may sound trivial but which I really would like to understand:
G says:
So, basically in the figures 7 and 8 on page 124 (the horizontal axis between frequencies f1 and (2xf1) there is a time component embedded? I mean, one can't (at least in 3D) measure acceleration without time dependency? I guess one could represent the process with to axes: (f) being vertical and (t) being horizontal.
So, if I understand this correctly, the 8 points were originally not chosen on the basis of consonance (music). Instead they are measurement points, like samples, of the acceleration of the frequency, am I wrong? And between every check point (do, re, mi...) the 'time gap' (delta t) is the same, am I completely off track here? What does the ratios 9/8, 10/9, 16/15 actually represent, in units?
So between (mi)-(fa), and (si)-(do) the frequency hasn't increased/decreased as much as at the other intervals - in the same amount of time (delta t)? So basically I've been wondering if G. did choose exactly eight check points because it was easier to present that way, or if there was another reason? I mean the 'sample rate' could have been e.g. much higher?
I tried also to find any research on this phenomenon, but so far without real success - which actually wasn't that surprising. Has there been any attempts to scientifically prove this discontinuity of vibration or is the phenomenon 'unmeasurable'?
Sorry for the many and maybe unclear questions!
G says:
"The principle of dividing into eight unequal parts the period, in which the vibrations are doubled, is based upon the observation of the non-uniform increase of vibrations in the entire octave, and separate 'steps' of the octave show acceleration and retardation at different moments of its development. [...] In very remote times one of the schools found that it was possible to apply this formula to music. In this way was obtained the seven-tone musical scale which was known in the most distant antiquity, then forgotten, and then discovered or 'found' again" (ISOTM, 124).
So, basically in the figures 7 and 8 on page 124 (the horizontal axis between frequencies f1 and (2xf1) there is a time component embedded? I mean, one can't (at least in 3D) measure acceleration without time dependency? I guess one could represent the process with to axes: (f) being vertical and (t) being horizontal.
So, if I understand this correctly, the 8 points were originally not chosen on the basis of consonance (music). Instead they are measurement points, like samples, of the acceleration of the frequency, am I wrong? And between every check point (do, re, mi...) the 'time gap' (delta t) is the same, am I completely off track here? What does the ratios 9/8, 10/9, 16/15 actually represent, in units?
So between (mi)-(fa), and (si)-(do) the frequency hasn't increased/decreased as much as at the other intervals - in the same amount of time (delta t)? So basically I've been wondering if G. did choose exactly eight check points because it was easier to present that way, or if there was another reason? I mean the 'sample rate' could have been e.g. much higher?
I tried also to find any research on this phenomenon, but so far without real success - which actually wasn't that surprising. Has there been any attempts to scientifically prove this discontinuity of vibration or is the phenomenon 'unmeasurable'?
Sorry for the many and maybe unclear questions!