JimLucas Posted October 30, 2014 Share Posted October 30, 2014 (edited) the row of tonic bass notes on the left-hand stradella bass system for PA and CBA are the same kind of deal. the note to one side of a given tonic bass note is its fifth. the note to the other side of that same tonic is that same tonic's fourth. not pitch-wise. note-name-wise. That's true as far as it goes, but as soon as you add such words as "up", "down", "above", or "below", you're talking about something different. I.e., the button below D (on the English) is G, which is "the fourth" of the D scale, but it's not "a fourth" below; it's a fifth below. I think ceemonster is getting into difficulties here by not distinguishing between notes in the scale and chords in the harmonic structure. I agree. Specific notes in a specific octave can be a fifth apart, e.g the G above middle C is a fifth above middle C; and reciprocally, that C is a fourth below that G. But please reread what you wrote above. You've just repeated his mistake. The interval between G and the C below it is a fifth, whether you're going from C to G or from G to C. The interval between G and the C above it is a fourth, whether you're going from C to G or from G to C. Yes, in terms of chords C is the "fourth" of the G scale, but that name is derived from the process of counting up from the tonic* -- i.e., from G up to C, -- never down. Noting that the first note is always counted as "one" (the "first"??), then counting from C up to G is a fifth (C=1, D=2, E=3, F=4, G=5), and counting from G down to C (same C and same G) is still a fifth (G=1, F=2, E=3, D=4, C=5). Counting from C down to G is a fourth (C=1, B=2, A=3, G=4), and it's also a fourth going the other direction, but in that case the C is above the G, where in the first example the C is below the G. Can't be both the same C and the same G.** * The "tonic" is the do of do-re-mi-fa-sol-la-ti. ** Unless it's on an instrument designed by M.C. Escher. Edited only to fix some formatting. Edited October 30, 2014 by JimLucas Quote Link to comment Share on other sites More sharing options...
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